Nail

Nail (pronounced neyl)

(1) A slender, typically rod-shaped rigid piece of metal, usually in many lengths and thicknesses, having (usually) one end pointed and the other (usually) enlarged or flattened, and used for hammering into or through wood, concrete or other materials; in the building trades the most common use is to fasten or join together separate pieces (of timber etc).

(2) In anatomy, a thin, horny plate, consisting of modified epidermis, growing on the upper side of the end of a finger or toe; the toughened protective protein-keratin (known as alpha-keratin, also found in hair) at the end of an animal digit, such as fingernail.

(3) In zoology, the basal thickened portion of the anterior wings of certain hemiptera; the basal thickened portion of the anterior wings of certain hemiptera; the terminal horny plate on the beak of ducks, and other allied birds; the claw of a mammal, bird, or reptile.

(4) Historically, in England, a round pedestal on which merchants once carried out their business.

(5) A measure for a length for cloth, equal to 2¼ inches (57 mm) or 1⁄20 of an ell; 1⁄16 of a yard (archaic); it’s assumed the origin lies in the use to mark that length on the end of a yardstick.

(6) To fasten with a nail or nails; to hemmer in a nail.

(7) To enclose or confine (something) by nailing (often followed by up or down).

(8) To make fast or keep firmly in one place or position (also used figuratively).

(8) Perfectly to accomplish something (usually as “nailed it”).

(9) In vulgar slang, of a male, to engage in sexual intercourse with (as “I nailed her” or (according to Urban Dictionary: “I nailed the bitch”).

(10) In law enforcement, to catch a suspect or find them in possession of contraband or engaged in some unlawful conduct (usually as “nailed them”).

(11) In Christianity, as “the nails”, the relics used in the crucifixion, nailing Christ to the cross at Golgotha.

(12) As a the nail (unit), an archaic multiplier equal to one sixteenth of a base unit

(13) In drug slang, a hypodermic needle, used for injecting drugs.

(14) To detect and expose (a lie, scandal, etc)

(15) In slang, to hit someone.

(16) In slang, intently to focus on someone or something.

(17) To stud with or as if with nails.

Pre 900: From the Middle English noun nail & nayl, from the Old English nægl and cognate with the Old Frisian neil, the Old Saxon & Old High German nagal, the Dutch nagel, the German Nagel, the Old Norse nagl (fingernail), all of which were from the unattested Germanic naglaz.  As a derivative, it was akin to the Lithuanian nãgas & nagà (hoof), the Old Prussian nage (foot), the Old Church Slavonic noga (leg, foot), (the Serbo-Croatian nòga, the Czech noha, the Polish noga and the Russian nogá, all of which were probably originally a jocular reference to the foot as “a hoof”), the Old Church Slavonic nogŭtĭ, the Tocharian A maku & Tocharian B mekwa (fingernail, claw), all from the unattested North European Indo-European ənogwh-.  It was further akin to the Old Irish ingen, the Welsh ewin and the Breton ivin, from the unattested Celtic gwhīnā, the Latin unguis (fingernail, claw), from the unattested Italo-Celtic əngwhi-;the Greek ónyx (stem onych-), the Sanskrit ághri- (foot), from the unattested ághli-; the Armenian ełungn from the unattested onogwh-;the Middle English verbs naile, nail & nayle, the Old English næglian and cognate with the Old Saxon neglian, the Old High German negilen, the Old Norse negla, from the unattested Germanic nagl-janan (the Gothic was ganagljan).  The ultimate source was the primitive Indo-European h₃nog- (nail) and the use to describe the metal fastener was from the Middle English naylen, from the Old English næġlan & nægl (fingernail (handnægl)) & negel (tapering metal pin), from the Proto-Germanic naglaz (source also of Old Norse nagl (fingernail) & nagli (metal nail).  Nail is a noun & verb, nailernailless & naillike are adjectives, renail is a verbs, nailing is a noun & vern and nailed is a verb & adjective; the noun plural is nails.

Nail is modified or used as a modifier in literally dozens of examples including finger-nail, toe-nail, nail-brush, nail-file, rusty-nail, garden-nail, nail-fungus, nail-gun & frost-nail.  In idiomatic use, a “nail in one's coffin” is a experience or event that tends to shorten life or hasten the end of something (applied retrospectively (ie post-mortem) it’s usually in the form “final nail in the coffin”.  To be “hard as nails” is either to be “in a robust physical state” or “lacking in human feelings or without sentiment”. To “nail one's colors to the mast” is to declare one’s position on something.  Something described as “better than a poke in the eye with a rusty nail” is a thing, which while not ideal, is not wholly undesirable or without charm.  In financial matters (of payments), to be “on the nail” is to “pay at once”, often in the form “pay on the nail”.  To “nail something down” is to finalize it. To have “nailed it” is “to perfectly have accomplished something” while “nailed her” indicates “having enjoyed sexual intercourse with her”.  The “right” in the phrase “hit the nail right on the head” is a more recent addition, all known instances of use prior to 1700 being “hit the nail on the head” and the elegant original is much preferred.  It’s used to mean “correctly identify something or exactly to arrive at the correct answer”.  Interestingly, the Oxford English Dictionary (OED) notes there is no documentary evidence that the phrase comes from “nail” in the sense of the ting hit by a hammer.

Double-headed nails.

Double-headed nails are used for temporary structures like fencing.  When the shaft is hammered in to the point where the surface of the lower head is flat against the surface of that into which it's being hammered, it leaves the upper head standing proud with just enough of the shaft exposed to allow a claw-hammer to be used to extract nail.  There is a story that as part of an environmental protest against the building or demolition of some structure (the tales vary), activists early one morning went to the temporary fencing around the contested site and hammered in all the double-headed nails.  This is believed to be an urban myth.

The sense of “fingernail” appears to be the original which makes sense give there were fingernails before there were spikes (of metal or any other material) used to build stuff.  The verb nail was from the Old English næglian (to fix or fasten (something) onto (something else) with nails), from the Proto-Germanic ganaglijan (the source also of the Old Saxon neglian, the Old Norse negla, the Old High German negilen, the German nageln and the Gothic ganagljan (to nail), all developed from the root of the nouns.  The colloquial meaning “secure, succeed in catching or getting hold of (someone or something)” was in use by at least the 1760; hence (hence the law enforcement slang meaning “to effect an arrest”, noted since the 1930s.  The meaning “to succeed in hitting” dates from 1886 while the phrase “to nail down” (to fix in place with nails) was first recorded in the 1660s.

Colors: Lindsay Lohan with nails unadorned and painted.

As a noun, “nail-biter” (worrisome or suspenseful event), perhaps surprisingly, seems not to have been in common use until 1999 an it’s applied to things from life-threatening situations to watching close sporting contests.  The idea of nail-biting as a sign of anxiety has been in various forms of literature since the 1570s, the noun nail-biting noted since 1805 and as a noun it was since the mid-nineteenth century applied to those individuals who “habitually or compulsively bit their fingernails” although this seems to have been purely literal rather than something figurative of a mental state.  Now, a “nail-biter” is one who is “habitually worried or apprehensive” and they’re often said to be “chewing the ends of their fingernails” and in political use, a “nail biter” is a criticism somewhat less cutting than “bed-wetter”.  The condition of compulsive nail-biting is the noun onychophagia, the construct being onycho- (a creation of the international scientific vocabulary), reflecting a New Latin combining form, from the Ancient Greek ὄνυξ (ónux) (claw, nail, hoof, talon) +‎ -phagia (eating, biting or swallowing), from the Ancient Greek -φαγία (-phagía).  A related form was -φαγος (-phagos) (eater), the suffix corresponding to φαγεῖν (phageîn) (to eat), the infinitive of ἔφαγον (éphagon) (I eat), which serves as aorist (essentially a compensator for sense-shifts) (for the defective verb ἐσθίω (esthíō) (I eat).  Bitter-tasting nail-polish is available for those who wish to cure themselves.  Nail-polish as a product dates from the 1880s and was originally literally a clear substance designed to give the finger or toe-nails a varnish like finish upon being buffed.  By 1884, it was being sold as “liquid nail varnish” including shads of black, pink and red although surviving depictions in art suggests men and women in various cultures have for thousands of years been coloring their nails.  Nail-files (small, flat, single-cut file for trimming the fingernails) seem first to have been sold in 1819 and nail-clippers (hand-tool used to trim the fingernails and toenails) in 1890.

Francis (1936-2025; pope 2013-2025) at the funeral of Cardinal George Pell (1941-2023), St Peter’s Basilica, the Vatican, January 2023.

The expression "nail down the lid" is a reference to the lid of a coffin (casket), the implication being one wants to make doubly certain anyone within can't possible "return from the dead".  The noun doornail (also door-nail) (large-headed nail used for studding batten doors for strength or ornament) emerged in the late fourteenth century and was often used of many large, thick nails with a large head, not necessarily those used only in doors.  The figurative expression “dead as a doornail” seems to be as old as the piece of hardware and use soon extended to “dumb as a doornail” and “deaf as a doornail).  The noun hangnail (also hang-nail) is a awful as it sounds and describes a “sore strip of partially detached flesh at the side of a nail of the finger or toe” and appears in seventeenth century texts although few etymologists appear to doubt it’s considerably older and probably a folk etymology and sense alteration of the Middle English agnail & angnail (corn on the foot), from the Old English agnail & angnail.  The origin is likely to have been literally the “painful spike” in the flesh when suffering the condition.  The first element was the Proto-Germanic ang- (compressed, hard, painful), from the primitive Indo-European root angh- (tight, painfully constricted, painful); the second the Old English nægl (spike), one of the influences on “nail”.  The noun hobnail was a “short, thick nail with a large head” which dates from the 1590s, the first element probably identical with hob (rounded peg or pin used as a mark or target in games (noted since the 1580s)) of unknown origin.  Because hobnails were hammered into the leather soles of heavy boots and shoes, “hobnail” came in the seventeenth century to be used of “a rustic person” though it was though less offensive than forms like “yokel”.

Nails and pins

Mug shot “pin” from TeePublic featuring Lindsay Lohan (b 1986, left), Donald Trump (b 1946; POTUS 2017-2021 and since 2025) and Paris Hilton (b 1981, right).  In this context, although the product really is “the badge”, the name was gained from the built-in pin supplied to secure the object to clothing.

As designs, a nail and a pin are similar, obviously differing only in scale but the function of each is different.  A nail’s primary purpose is to function as a structural fastener joining materials (most typically two or more pieces of wood) although there are specialized nails driven into substrate by impact (variously with hammers or nail guns (sometimes called “pin-nailers”, some of which are built to fire “panel pins” (very slender nails) or small “headless nails”).  A nail relies on friction and compression in the surrounding material for its holding strength.  Pins look like scaled-down nails but mostly are used for alignment, retention or pivoting, rather than structural load-bearing.  Because of their more delicate construction, pins often are inserted through specific-purpose, pre-existing holes and in many cases are intended to be temporary and are thus removable.  Visually, both nails and pins have heads (round, flat, clipped etc) and a tapered shank with a tip pointed for pointed tip for penetration (“snub-nosed” nails do exist but are rare) and both are designed slightly to deform the surrounding material when driven.  The most obvious difference is that a pin’s head is very small and some are spherical and made from plastic; they’re designed only to be pushed with finger-pressure rather than being hit with a hammer.  Although the term “pin” is used for some specialized devices used in building and engineering (dowel pin, pivot pin, gudgeon pin (also as wrist pin), roll pin, cotter pin etc), the word is most associated with the tailor’s pin (used mostly in textiles and usually clipped to “pin”).  In jewelry design and textiles there are also variants including the “lapel pin” and the fashion industry’s device of last resort, the “safety pin”.

Pinhead in publicity shot for Hellraiser III: Hell on Earth (1992).

Clive Barker's (b 1952) supernatural horror movie Hellraiser (1987) was based on his novella The Hellbound Heart (1986) and was a surprise hit, making it a franchise which has thus far spawned nine sequels, the most recent released in 2022.  The plot involved a mysterious puzzle box that, when opened, summoned the Cenobites, a group of extra-dimensional, sadomasochistic beings unable to differentiate between pain and pleasure.  It was a good premise for a horror movie but the character who really captured the audience's imagination was the unnamed figure viewers dubbed “Pinhead”.  Although Pinhead appeared in the original film for fewer than ten minutes, the character became the franchise’s focal point and has since dominated the publicity material for subsequent releases.  The popularity of Hellraiser has been maintained and it’s hoped that for the next release the producers will offer the part to Peter Dutton (b 1970; leader of the Liberal Party of Australia 2022-2025).

Peter Dutton captured by a photographer during a happy moment (left), Pinhead with the box able to summon the Cenobites (centre) and and artist's depiction of Mr Dutton in “Pinhead mode” (digitally altered image, right).

No longer burdened with tiresome parliamentary duties since losing his seat in the 2025 Australian general election, Mr Dutton has time for a third career and he should be good at playing an unsmiling character who speaks in a relentless monotone; really, all he need do is act naturally.  It’s suspected also he’ll be good at learning a script given the decades he spent parroting “talking points” and TWS (three word slogans).  While it’s an urban myth Mr Dutton wasn’t offered the part of Lord Voldemort in the Harry Potter movie franchise because he was deemed “too scary”, as Pinhead he’d be “just scary enough”.  While the LNP (Liberal National Party) state government in Queensland recently has appointed Mr Dutton to the board of the QIC (Queensland Investment Corporation, the investment manager of the state’s Aus$135 billion in assets), it’s understood his duties in the Aus$130,000 per annum role will be neither onerous or time-consuming so there’ll be ample opportunity for film-shoots.  Although when in opposition the LNP had decried the ALP (Australian Labor Party) government’s frequent appointment of ALP figures to lucrative sinecures, once in office the LNP continued the “jobs for the boys” tradition.  In the modern era, the two most striking characteristics of right-wing fanatics is (1) a fondness for sitting safely in a bunker while advocating for (and sometimes sending) other people's children to go a fight a war somewhere and (2) after a career spent extolling the virtues of “private enterprise” and criticizing “government waste”, being anxious to get back on the public payroll as soon as their political careers end.  Reassuringly for taxpayers who may have been worried Mr Dutton would not be able to continue to enjoy the lifestyle to which their taxes made him accustomed (“entitled” as he might have put it), it’s believed his director’s fees from QIC will not affect his parliamentary pension (understood to be between Aus$260,000-Aus$280,000 per annum).

The Buick Nailhead

In the 1930s, the straight-8 became a favorite for manufacturers of luxury cars, attracted by its ease of manufacture (components and assembly-line tooling able to be shared with those used to produce a straight-6), the mechanical smoothness inherent in the layout and the ease of maintenance afforded by the long, narrow configuration, ancillary components readily accessible.  However, the limitations were the relatively slow engine speeds imposed by the need to restrict the “crankshaft flex” and the height of the units, a product of the long strokes used to gain the required displacement.  By the 1950s, it was clear the future lay in big-bore, overhead valve V8s although the Mercedes-Benz engineers, unable to forget the glory days of the 1930s when the straight-eight W125s built for the Grand Prix circuits generated power and speed Formula One wouldn’t see until the 1980s, noted the relatively small 2.5 litre (153 cubic inch) displacement limit for 1954 and conjured up a final fling for the layout.  Used in both Formula One as the W196R and in sports car racing as the W196S (better remembered as the 300 SLR) the new 2.5 & 3.0 litre (183 cubic inch) straight-8s, unlike their pre-war predecessors, solved the issue of crankshaft flex (the W196's redline was 9500 compared with the W125's 5800) by locating the power take-off at the centre, adding mechanical fuel-injection and a desmodromic valve train to make the things an exotic cocktail of ancient & modern (on smooth racetracks and in the hands of skilled drivers, the swing axles at the back not the liability they might sound).  Dominant during 1954-1955 in both Formula One & the World Sports Car Championship, they were the last of the straight-8s in top-line competition.

Schematic of Buick “Nailhead” V8, 1953-1966.

Across the Atlantic, the US manufacturers also abandoned their straight-8s.  Buick introduced their overhead valve (OHV) V8 in 1953 but, being much wider than before, the new engine had to be slimmed somewhere to fit between the existing inner-fenders (it would not be until later the platform was widened).  To achieve this, the engineers narrowed the cylinder heads, compelling both a conical (the so-called “pent-roof”) combustion chamber and an arrangement in which the sixteen valves pointed directly upwards on the intake side, something which not only demanded an unusual pushrod & rocker mechanism but also limited the size of the valves.  So, the valves had to be tall and narrow and, with some resemblance to nails, they picked up the nickname “nail valves”, morphing eventually to “nailhead” as a description of the whole engine.  The valve placement and angle certainly benefited the intake side but the geometry compromised the flow of exhaust gases which were compelled by their anyway small ports to make a turn of almost 180^o on their way to the tailpipe.  As an indication of the heat-soak generated by that 180^o turn, the surrounding water passages were very wide. 

It wasn't the last time the head design of a Detroit V8 would be dictated by considerations of width.  When Chrysler in 1964 introduced the 273 cubic inch (4.5 litre) V8 as the first of its LA-Series (that would begat the later 318 (5.2), 340 (5.5) & 360 (5.9) as well as the V10 made famous in the Dodge Viper), the most obvious visual difference from the earlier A-Series V8s was the noticeably smaller cylinder heads.  The A engines used as skew-type valve arrangement in which the exhaust valve was parallel to the bore with the intake valve tipped toward the intake manifold (the classic polyspherical chamber).  For the LA, Chrysler rendered all the valves tipped to the intake manifold and in-line (as viewed from the front), the industry’s standard approach to a wedge combustion chamber.  The reason for the change was that the decision had been taken to offer the compact Valiant with a V8 but it was a car which had been designed to accommodate only a straight-six and the wide-shouldered polyspheric head A-Series V8s simply wouldn’t fit.  So, essentially, wedge-heads were bolted atop the old A-Series block but the “L” in LA stood for light and the engineers wanted something genuinely lighter for the compact (in contemporary US terms) Valiant.  Accordingly, in addition to the reduced size of the heads and intake manifold, a new casting process was developed for the block (the biggest, heaviest part of an engine) which made possible thinner walls.  "Light" is however a relative term and the LA series was notably larger and heavier than Ford's "Windsor" V8 (1961-2000) which was the exemplar of the "thin-wall" technique.  This was confirmed in 1967 when, after taking control of Rootes Group, Chrysler had intended to continue production of the Sunbeam Tiger, by then powered by the Ford Windsor 289 (4.7 litre) but with Chrysler’s 273 LA V8 substituted.  Unfortunately, while 4.7 Ford litres filled it to the brim, 4.4 Chrysler litres overflowed; the Windsor truly was compact.  Allowing it to remain in production until the stock of already purchased Ford engines had been exhausted, Chrysler instead changed the advertising from emphasizing the “…mighty Ford V8 power plant” to the vaguely ambiguous “…an American V-8 power train”.

322 cubic inch Nailhead in 1953 Buick Skylark convertible (left) and 425 cubic inch Nailhead in 1966 Buick Riviera GS (with dual-quad MZ package, right).  Note the “Wildcat 465” label on the air cleaner, a reference to the claimed torque rating, something most unusual, most manufacturers using the space to advertise horsepower or cubic inch displacement (CID).

The nailhead wasn’t ideal for producing top-end power but the design did generate prodigious low-end torque, something much appreciated by Buick's previous generation of buyers who much had relished the low-speed responsiveness of the famously smooth straight-8.  However, like everybody else, Buick hadn’t anticipated that as the 1950s unfolded, the industry would engage in a “power race”, something to which the free-breathing Cadillac V8s and Chrysler’s Hemis were well-suited.  For that, the somewhat strangulated Buick Nailhead was not at all suited and to gain power the engineers were compelled to add high-lift, long-duration camshafts which enabled the then magic 300 HP (horsepower) number to be achieved but at the expense of smoothness; tales of Buick buyers (long accustomed to straight-8s that ran so smoothly at idle it could be hard to tell if the things were running) returning to the dealer to fix the “rumpity-rump” became legion.  Still, the Nailhead was robust, relatively light and offered what was then a generous displacement and the ever inventive hot-rod community soon worked out the path to power was to use forced induction and invert the valve use, the supercharger blowing the fuel-air mix into the combustion chambers through the exhaust ports while the exhaust gases were evacuated through the larger intake ports.  Thus, for a while, the Nailhead enjoyed a role as a niche player although the arrival in the mid 1950s of the much more tuneable Chevrolet V8s ended the vogue for all but a few devotees who continued use well into the 1960s.  Buick acknowledged reality and, unusually, instead of following the industry trend and drawing attention to displacement & power, publicized their big torque numbers, confusing some (though probably not Buick buyers who were a loyal crew who sometimes would look down on more expensive Cadillacs because they were "flashy").  The unique appearance of the old Nailhead retains some nostalgic appeal for the modern hot-rod community and they do sometimes appear, a welcome change from the more typical small-block Fords or Chevrolets.

Lockheed SR-71 Blackbird (1964-1999).

Not confused about numbers was the USAF (United States Air Force) which was much interested in power for its aircraft but also had a special need for torque on the tarmac and briefly that meant another quirky niche for the Nailhead.  The Lockheed SR-71 Blackbird (1964-1979) was a long-range, high-altitude supersonic (Mach 3+) aircraft used by the USAF for reconnaissance between 1966-1998 and by the NASA (National Aeronautics & Space Administration) for observation missions as late as 1999.  Something of a high-water mark among the extraordinary advances made in aeronautics and materials construction during the Cold War, the SR-71 used Pratt & Whitney J58 turbojet engines which featured an innovative, secondary air-injection system for the afterburner, permitting additional thrust at high speed.  The SR-71 still holds a number of altitude and speed records and Lockheed’s SR-72, a hypersonic unmanned aerial vehicle (UAV) is said to be in an “advanced stage” of design and construction although whether any test flights will be conducted before 2030 remains unclear, the challenges of sustaining in the atmosphere velocities as high as Mach 6+ onerous given the heat generated and stresses imposed by the the fluid dynamics of air at high speed.

Drawing from user manual for AG330 starter cart (left) and AG330 starter cart with dual Buick Nailhead V8s (right).

At the time, the SR-71 was the most exotic aircraft on the planet but during testing and early in its career, just for the engines to start it relied on a pair of even then technologically bankrupt Buick Nailhead V8s.  These were mounted in a towed cart and were effectively the turbojet’s starter motor, a concept developed in the 1930s as a work-around for the technology gap which emerged as the V12 aero-engines became too big to start by hand but lacked on-board electrical systems to trigger ignition.  The two Nailheads were connected by gears to a single, vertical drive shaft which ran the jet up to the critical speed at which ignition became self-sustaining.  The engineers chose the Nailheads after comparing them to other large displacement V8s, the aspect of the Buicks which most appealed being the torque generated at relatively low engine speeds, a characteristic ideal for driving an output shaft, torque best visualized as a "twisting" force.  After the Nailhead was retired in 1966, later carts used Chevrolet big-block V8s but in 1969 a pneumatic start system was added to the infrastructure of the USAF bases from which the SR-71s most frequently operated, the sixteen-cylinder carts relegated to secondary fields the planes rarely used.

Cage

Cage (pronounced keyj)

(1) A boxlike enclosure having wires, bars, or the like, for confining and displaying birds or animals or as a protective barrier for objects or people in vulnerable positions (used in specific instances as battery cage, bird-cage, birdcage, Faraday cage, tiger cage, fish cage etc).

(2) Anything that confines or imprisons; prison and figuratively, something which hinders physical or creative freedom (often as “caged-in”).

(3) The car or enclosed platform of an elevator.

(4) In underground mining, (1) an enclosed platform for raising and lowering people and cars in a mine shaft & (2) the drum on which cable is wound in a hoisting whim.

(5) A general descriptor for any skeleton-like framework.

(6) In baseball (1) a movable backstop for use mainly in batting practice & (2) the catcher's wire mask.

(7) In ice hockey and field hockey, a frame with a net attached to it, forming the goal.

(8) In basketball, the basket (mostly archaic).

(9) In various sports which involve putting a ball or other object into or through a receptacle (net, hole), to score a goal or something equivalent.

(10) In fashion, a loose, sheer or lacy overdress worn with a slip or a close-fitting dress.

(11) In ordnance, a steel framework for supporting guns.

(12) In engineering (1) various forms of retainers, (2) a skeleton ring device which ensures the correct space is maintained between the individual rollers or balls in a rolling bearing & (3) the wirework strainers used to remove solid obstacles in the fluids passing through pumps and pipes

(13) To put (something or someone) into some form of confinement (which need not literally be in a cage).

(14) In underwear design, as cage bra, a design which uses exposed straps as a feature.

(15) In computer hardware, as card cage, the area of a system board where slots are provided for plug-in cards (expansion boards).

(16) In anatomy (including in zoology) as rib-cage, the arrangement of the ribs as a protective enclosure for vital organs.

(17) In athletics, the area from which competitors throw a discus or hammer.

(18) In graph theory, a regular graph that has as few vertices as possible for its girth.

(19) In killer Sudoku puzzles, an irregularly-shaped group of cells that must contain a set of unique digits adding up to a certain total, in addition to the usual constraints of Sudoku.

(20) In aviation, to immobilize an artificial horizon.

1175–1225: From the Middle English cage (and the earlier forms kage & gage), from the Old French cage (prison; retreat, hideout), from the Latin cavea (hollow place, enclosure for animals, coop, hive, stall, dungeon, spectators' seats in a theatre), the construct being cav(us) (hollow) + -ea, the feminine of -eus (the adjectival suffix); a doublet of cadge and related to jail.  The Latin cavea was the source also of the Italian gabbia (basket for fowls, coop).  The noun (box-like receptacle or enclosure, with open spaces, made of wires, reeds etc) typically described the barred-boxes used for confining domesticated birds or wild beasts was the first form and form circa 1300 was used in English to describe "a cage for prisoners, jail, prison, a cell".  The noun bird-cage (also birdcage) was in the late fifteenth century formed to describe a "portable enclosure for birds", as distinct from the static cages which came to be called aviaries.  The idiomatic use as “gilded cage” refers to a place (and, by extension, a situation) which is superficially attractive but nevertheless restrictive (a luxurious trap) and appears to have been coined by the writers of the popular song A Bird in a Gilded Cage (1900).  To “rattle someone's cage” is to upset or anger them, based on the reaction from imprisoned creatures (human & animal) to the noise made by shaking their cages.  The verb (to confine in a cage, to shut up or confine) dates from the 1570s and was derived from the noun.  The synonyms for the verb include crate, enclosure, jail, pen, coop up, corral, fold, mew, pinfold, pound, confine, enclose, envelop, hem, immure, impound, imprison, incarcerate, restrain & close-in.  Cage is a noun, verb and (occasional) adjective, caged & caging are verbs (used with object) and constructions include cage-less, cage-like, re-cage; the noun plural is cages.

Wholly unrelated to cage was the adjective cagey (the frequently used derived terms being cagily & caginess), a US colloquial form meaning “evasive, reticent”, said to date from 1896 (although there had in late sixteenth century English been an earlier cagey which was a synonym of sportive (from sport and meaning “frolicsome”)).  The origin of the US creation (the sense of which has expanded to “wary, careful, shrewd; uncommunicative, unwilling or hesitant to give information”) is unknown and despite the late nineteenth century use having been attested, adoption must have been sufficiently hesitant not to tempt lexicographers on either side of the Atlantic because cagey appears in neither the 1928 Webster’s Dictionary nor the 1933 supplement to the Oxford English Dictionary (OED).  John Cage (1912–1992) was a US avant-garde composer who, inter alia, was one of the pioneers in the use of electronic equipment to create music.  He’s also noted for the 1952 work 4′33″ which is often thought a period of literal silence for a duration of that length but is actually designed to be enjoyed as the experience of whatever sounds emerge from the environment (the space, the non-performing musicians and the audience).  It was an interesting idea which explored both the definitional nature of silence and paralleled twentieth century exercises in pop-art in prompting discussions about just what could be called "music".

The related forms jail and gaol are of interest.  Jail as a noun dates from circa 1300 (although it had by then been used as a surname for at least a hundred years) and meant "a prison; a birdcage".  It was from the Middle English jaile, from the Old French jaiole (a cage; a prison), from the Medieval Latin gabiola (a cage (and the source also of the Spanish gayola and the Italian gabbiula)), from the Late Latin caveola, a diminutive of the Latin cavea.  The spellings gaile & gaiole were actually more frequent forms in Middle English, these from the Old French gaiole (a cage; a prison), a variant spelling thought prevalent in the Old North French, which would have been the language most familiar to Norman scribes, hence the eventual emergence of gaol which emerged under that influence.  It’s long been pronounced jail and the persistence of gaol as the preferred form in the UK is attributed to the continued use in statutes and other official documents although there may also have been some reluctance to adopt “jail” because this had come to be regarded as an Americanism.

The Mortsafe

A mortsafe.

The construct was mort + safe.  Mort was from the Middle English mort, from the Old French mort (death).  Safe was from the Middle English sauf, safe, saf & saaf, from the Old French sauf, saulf & salf (safe), from the Latin salvus (whole, safe), from the Proto-Italic salwos, from the primitive Indo-European solh- (whole, every); it displaced the native Old English sicor (secure, sure).  In the case of “mortsafe”, the “mort” element was used in the sense of “corpse; body of the dead”).  The “safe” element can be read either as a noun (an enclosed structure in which material can be secure from theft or other interference) or verb (to make something safe).  For its specific purpose, a mortsafe wholly was analogous with other constructions (meatsafe, monesafe etc).

Popular in the UK in the eighteenth & nineteenth century, mortsafes were structures placed over a grave to prevent resurrectionists (now better remembered as “body-snatchers” or “grave-robbers”) from exhuming the corpse or stealing any valuables which may have been interred with the dead.  The companion term was morthouse which was a secure facility in which bodies were kept for a period prior to burial (obviating the need for a mortsafe).  The noun “resurrectionist” was later re-purposed to describe (1) a believer in a future bodily resurrection, (2) one who revives (more often “attempts to revive”) old practices or ideas (3) one who (for profit or as a hobby) restores or reconditions objects) and (4) in the humor of the turf, a racehorse that mid-course recovers its speed or stamina.  Fashioned usually of wrought iron (sometimes in combination with concrete slabs), those which were hired or leased for only a few weeks usually were secured by the design including pile-like extensions driven into the ground while those permanently installed were “concreted in”.  The tradition of burying the dead with valuables has a long history (the best known example being the tombs of the pharaohs (supreme rulers) of Ancient Egypt) and although in the eighteenth century UK any treasure likely to end up in coffins was by comparison modest, items like wedding rings or other jewellery sometimes were included.  The body-snatcher trade existed because there was demand from medical schools which needed a fair number of fresh cadavers for anatomical study and student instruction.

Demand: Anatomische les van dr. Willem Röell (1728), (Anatomy lesson by Dr Willem Röell (1700-1775)), oil on canvas by Cornelis Troost (1697-1750), Amsterdam Museum.

The Enlightenment (which appears in history texts also as the “Age of Reason”) was the period Europe which created the a framework for modernity.  Beginning late in the seventeenth century, it was an intellectual and cultural movement which sought to apply reason and scientific rigor to explore or explain.  Throughout the eighteenth century the Enlightenment spread throughout Western Europe, the Americas and much of the territory of European empires, brining ideas of individual liberty, religious tolerance and the concept of systematic scientific investigation.  Superstitions didn’t vanish as the Enlightenment spread truth, but was increasingly marginalized to matters where proof or disproof were not possible.  One of the benefits of the Enlightenment was the expansion of medical education which was good (at least sometimes) but it also created a demand for fresh corpses which could be used for dissection, the quite reasonable rationale being it was preferable for students to practice on the dead rather than the living; in the pre-refrigeration-age, demand was high and, during the instructional terms of medical schools, often constant.  The Enlightenment didn’t change the laws of supply and demand and entrepreneurial commerce was there to provide supply, the resurrectionists undertaking their ghoulish work usually under cover of darkness when cemeteries tended to be deserted.

Supply: Resurrectionists at work (1887), illustration by Hablot Knight Browne (1815–1882) whose work usually was credited to his pen-name "Phiz".

Ghoul was from the French goule, from the Persian غول (ġul), from the Arabic غُول (ḡūl) and in mythology, ghouls were demons from the underworld who at night visited the Earth to feast on the dead.  It was an obvious term to apply to grave-robbers although for generations their interests tended to be in the whatever valuables might be found and it was only later “specialists” came to be known as “body-snatchers”, a profession created by corpses becoming commodities.  By extension, in the modern era, those with a disturbing or obsessive interest in stuff to do with the death or dying came to be labelled “ghouls” and their proclivities “ghoulish”.  Mortsafes were a usually effective deterrent to body-snatching and some have survived although they were in the eighteenth century more common than those few would suggest.  While wealthy families paid for permanent structures, many were leased from cemeteries or ironmongers for only the short time required before the processes of decay and putrefaction rendered a corpse no longer a tradeable commodity.  Sturdy and durable, ex-lease mortsafes were recycled for the next burial.  Despite the Enlightenment, rumors did still spread the mortsafes were there to prevent keep the undead from rising to again walk the earth but genuinely they were there to keep others out, not the deceased in.  Still, the idea has potential and were crooked Hillary Clinton (b 1947; US secretary of state 2009-2013) to die (God forbid), some might be tempted to install a mortsafe atop her grave so she can’t arise…just to be sure.

Turreted watchtower (1827), Dalkeith Cemetery, near Edinburgh (photograph by Kim Traynor).

In England, the Murder Act (1751) had mandated the bodies of executed criminals could be deemed property of the state and a supply for the training of surgeons thus existed but demand proved greater.  The solution of the authorities was usually to “turn a blind eye” to activities of the grave-diggers (as long as they restricted the trade to snatching the deceased working class) although in Scotland which (as it does now) operated a separate legal system, there was much public disquiet because, north of the border, there was great reverence for the dead and among the population a widespread belief in resurrection (in the sacred sense), the precepts of which included that the dead could not rise from a bodily incomplete state.  Body snatchers were thus thought desecrationists and vigilantes formed into parties to protect graveyards and there were even fatalities as body-snatchers were attacked.  In Scotland, so seriously was the matter taken there were graveyards with permanent stone structures (“watch-towers” or “watch-houses”) to house the “watchers”, volunteer organizations (which, depending on the size of the town could be over a thousand-strong) with rosters so shifts were available to watch over the site.  Reputedly, especially entrepreneurial suppliers of demand solved the problem of interference by the authorities or “concerned citizens” by “cutting out the middle man” (as it were), murdering tramps, vagrants and such to be supplied to surgeons trusted not to ask too many questions.  The legislative response in the UK was the Anatomy Act (1832, known as the “Warburton Anatomy Act”) which made lawful the donation of dead bodies to those “authorized parties” (surgeons, researchers, medical lecturers and students) licence to dissect; this was the codified origin of the notion of “donating one’s body to science”, the modern fork of which is the “organ donation” system.  With the passage of the 1832 act, supply soon exceed demand with it becoming (in some circles) fashionable to include in one’s will a clause “donate my body to science” while some families, in the spirit of the Enlightenment anxious to assist the progress of medical science made the gesture while others wished just to avoid the expense of a funeral.

The cage bra

The single strap cage bra.

A cage bra is built with a harness-like structure which (vaguely) resembles a cage, encapsulating the breasts using one or more straps.  Few actually use those straps predominately to enhance support and the effect tends to be purely aesthetic, some cage bras with minimal (or even absent) cup coverage and a thin band or multi-strap back.  Designed to be at least partially seen and admired, cage bras can be worn under sheer fabrics, with clothes cut to reveal the construction or even (in elaborated form and often on red carpets) worn alone, the effect borrowed from engineering or architecture where components once concealed (air conditioning ducting, plumbing, electrical conduits etc) deliberately are exposed.  It’s thus a complete reversal of the old rule in which the sight of a bra strap was a fashion-fail.  The idea has been extended to sports bras which anyway have long often used additional, thick straps to enhance support and minimize movement, especially those induced by lateral forces not usually encountered in everyday life.  

Lindsay Lohan in harness cage bra with sheer cups and matching knickers.

The cage bra's salient features include: (1) the straps which are a cage’s most distinctive feature.  The most simple include only a single additional strap across the centre while others have a pair, usually defining the upper pole of each cup.  Beyond that, multiple straps can be used, both at the front and back, some of which may have some functional purpose or be merely decorative.  Single strap cage bras are often worn to add distinctiveness to camisoles while those with multiple straps are referred to as the harness style and have the additional benefit (or drawback depending on one’s view) of offering more frontal coverage, the straps sometimes a framework for lace or other detailing; this is a popular approach taken with cage bralettes.

Front and back views of modestly-styled criss-cross cage bras.

(2) Many cage bras are constructed around a traditional back band, especially those which need to provide lift & support while those (usually with smaller cups) have a thin band (merely for location) or none at all.  In this acknowledgement of the laws of physics, they’re like any other bra.  Those with a conventional back band (both bras and bralettes) are often constructed as the V-shaped cage, the symmetrical straps well suited to v-necks or even square necks and paired with cardigans or more structured jackets or blazers, they’re currently the segment's best-sellers.  A more dramatic look is the criss-cross cage but fashionistas caution this works well only in minimal surroundings so accessories should be limited to earrings or stuff worn on the wrist or beyond.

Example of the cage motif applied to a conventional bra, suitable for larger sizes.

(3) As a general principle, the cage bras manufactured tend to be those with cup sizes in the smaller range, supply reflecting the anticipated demand curve.  However, even the nominal size (A, B, C etc) of the cups of cage bras can be misleading because they almost always have less coverage than all but the most minimal of those used by conventional bras and should be compared with a demi cup or the three-quarter style of plunge bras.  That said, there are strappy designs which include molded cups with underwires suitable for larger sizes but it’s a niche market and the range is limited, the scope for flourishes being limited by the need to preserve functionality, a demand which, all else being equal, tends to increase with as mass grows.  Unlike the structural underwire, many of the "underwireish" parts of a cage bra purely are decorative.

Examples of designs used to fabricate harness cage bras which can be worn under or over clothing or, in some cases, to augment a more conventional bra or bralette.

(4) Despite the specialized nature of cage bras, some are multi-purpose and include padding with all the usual advantages in concealment and additional volume, permitting use as an everyday garment rather than one used exclusively for display.  Some include removable padding so the bra can be transformed into a see-through design.

Choker cage bra.

(5) The methods of closure type vary.  The most uncompromising designs actually have no closure mechanism; the idea being one would detract from the purity of the lines so this requires the wearer to pull it over the head; to be fashionable, sometimes there's a price to be paid.  Other types use both front and back closures, usually with conventional hook & clasp fittings (so standard-sized extenders can sometimes be used) but there are some which borrow overtly from the traditions of BDSM underwear (the origin of the cage bra motif) and use extravagantly obvious buckles and even the occasional key-lock.  The BDSM look is most obviously executed in the choker cage bra which includes a neck choker as a focal point to accentuate the neck and torso, something best suited to a long, slender neck.  Buyers are are advised to move around when trying these on because the origins of the BDSM motif lay in devices used in Medieval torture routines so a comfortable fit is important.

Cage bralette.

(6) Almost all cage bras continue to use the same materials as conventional garments, the fabrics of choice being nylon or spandex, their elasticity permitting some adjustments to accommodate variations in shape or location.  Sometimes augmented with lace, fabric, mesh or metal rings, straps can also be made from leather.

Singer Ricki-Lee Coulter (b 1985, left) in a (sort of) dress with an illusion panel under the strappings which may be compared with an illusion bra (right).

(7) The cage and the illusion. The illusion industry variously exchanges and borrows motifs.  Used by fashion designers, the illusion panel is a visual trick which to some extent mimics the appearance of bare skin.  It’s done with flesh-colored fabric, cut to conform to the shape of wearer and the best known products are called illusion dresses although the concept can appear on other styles of garment.  Done well, the trick works, sometimes even close-up but it’s ideal for photo opportunities.  Because cage bras use a structure which can recall the struts used in airframes or the futtocks which are part of nautical architecture, they're an ideal framework for illusion panels.