Button

Button (pronounced buht-n)

(1) A small disk, knob, or the like for sewing or otherwise attaching to an article, as of clothing, serving as a fastening when passed through a buttonhole or loop.

(2) Anything resembling a button, especially in being small and round, as any of various candies, ornaments, tags, identification badges, reflectors, markers, etc.

(3) A badge or emblem bearing a name, slogan, identifying figure, etc., for wear on the lapel, dress, etc.

(4) Any small knob or disk pressed to activate an electric circuit, release a spring, or otherwise operate or open a machine, small door, toy, etc.

(5) In botany, a bud or other protuberant part of a plant.

(6) In mycology, a young or undeveloped mushroom or any protuberant part of a fungus.

(7) In zoological anatomy, any of various small parts or structures resembling a button, as the rattle at the tip of the tail in a very young rattlesnake.

(8) In boxing slang, the point of the chin.

(9) In architecture, a fastener for a door, window, etc., having two arms and rotating on a pivot that is attached to the frame (also called turn button).

(10) In metallurgy, when assaying, the small globule or lump of metal at the bottom of a crucible after fusion.

(11) In fencing, the protective, blunting knob fixed to the point of a foil.

(12) In horology, alternative name for the crown, by which watch is wound.

(13) In the graphical user interface of computers and related devices, a small, button-shaped or clearly defined area that the user can click on or touch to choose an option.

(14) Slang term for the peyote cactus.

(15) A small gathering of people about two-thirds of the drinks are spiked with LSD.  Those who drink the un-spiked are the buttons responsible for babysitting the trippers (1960s west coast US use, now extinct).

(16) A series of nuts & bolts holding together a three-piece wheel.  Such wheels are very expensive because of the forging process and the ability to stagger offsets to create large lips.

(17) In boiler-making, the piece of a weld that pulls out during the destructive testing of spot welds

(18) In rowing, a projection around the loom of an oar that prevents it slipping through the rowlock.

(19) South African slang for methaqualone tablet.

(20) A unit of length equal to one twelfth of an inch (British, archaic).

(21) Among luthiers, in the violin-family instrument, the near semi-circular shape extending from the top of the back plate of the instrument, meeting the heel of the neck.

(22) In the plural (as buttons), a popular nickname for young ladies, whose ability to keep shirt buttons buttoned is in inverse proportion to the quantity of strong drink taken.

1275-1325: From the Middle English boto(u)n (knob or ball attached to another body (especially as used to hold together different parts of a garment by being passed through a slit or loop)), from the Anglo-French, from the Old & Middle French boton (button (originally, a bud)), from bouter & boter (to thrust, butt, strike, push) from the Proto-Germanic buttan, from the primitive Indo-European root bhau- (to strike); the button thus, etymologically, is something that pushes up, or thrusts out.  Records exist of the surname Botouner (button-maker) as early as the mid-thirteenth century (and the Modern French noun bouton (button) actually dates from the twelfth century).  It was cognate with the Spanish boton and the Italian bottone.  The pugilistic slang (point of the chin) was first noted in 1921.  First use of button as something pushed to create an effect by opening or closing an electrical circuit is attested from 1840s and the use in metallurgy and welding is based by analogy on descriptions of mushrooms.  The verb button emerged in the late fourteenth century in the sense of "to furnish with buttons" which by the early 1600s had extended (when speaking of garments) to "to fasten with buttons".  The button-down shirt collar was first advertised in 1916.

John Button (1987) (1933-2008; senator for Victoria (Australian Labor Party (ALP) 1974-1993), oil on canvas by Andrew Sibley (1933–2015), National Portrait Gallery, Canberra, Australia.

New uses continue to emerge as technology evolves:  The phrase button-pusher to describe someone "deliberately annoying or provocative" was first recorded in the 1970s and hot-button issue appeared in political science journals as early as 1954, apparently a derivation of the brief use in the press of big red-button and hot-button to (somewhat erroneously) describe the mechanics of launching a nuclear attack.  Hot button issues can be useful for political parties to exploit but what the button triggers can shift with generational change: As late as the 1990s the Republican Party in the US used "gay marriage" as a hot button issue to mobilize their base but within 25 years the electoral universe had shifted and the issue no longer had the same traction.  In the 1980s, the now mostly extinct button-pusher had been co-opted as a somewhat condescending description of photographers both by journalists and snobby art critics, the former suggesting some lack of affinity with words, the latter, an absence of artistic skill. 

2022 Mercedes-Benz EQS 56 inch (1.42 m) single-panel screen.  There are no physical buttons on the dashboard.

In cars, as in aircraft, the shifting of controls for core and ancillary systems from individual buttons and switches to combined or multi-function controllers began to accelerate during the 1960s, a reaction to the increasing number of electrically activated functions being installed to the point where, if left individualised, in some of the more electronic vehicles, space for all the buttons would have been marginal and ergonomics worse even than it was.  Some very clever designs of multi-function controllers did appear but in the twenty-first century, by the time LED flat-screen technology had become elsewhere ubiquitous, it became possible to integrate entire system control environments into a single screen which, able to display either one or a combination of several sub-systems at a time, meant space became effectively unlimited, arrays of virtual buttons and switches available in layers. 

1965 Jaguar S-Type 3.8.  Jaguar in the 1960s used more switches ("toggle" and later "rocker" to comply with safety regulations) than buttons. 

The manufacturers liked the change because it was so much cheaper to produce and install than an array of individual buttons, switches, instruments and lights, behind each of which ran at least one and sometimes several wires or lines, requiring wiring schematics that were sometimes baffling even to experts who needed sometime to track literally miles of wiring.   While now using actually even more wiring, the new systems are functionally better although their long-term reliability remains uncertain.  What will certainly be lost is the sometimes sensual atmospherics the tactile, analogue world of buttons could summon.

Centre console in 1993 Mercedes-Benz 600 SEL (W140).

The W140 (1991-1998) was probably peak-button and it won't happen again.  The W140 was end-of-era stuff in many ways and was the last of the old-style exercises in pure engineering with which Mercedes-Benz re-built its reputation in the post-war years; what followed would increasingly show the influence of accountants and the dreaded "sales department".  Best of the W140s were the early, 408 bhp (304 kw) 600 SELs tuned for top end power; the 6.0 litre (M-120; 1991-2001) V12 would later be toned-down a little and thoughts of the 8.0 litre V16 and W18 prototypes entering production were shelved as the economic climate of the early 1990s proved less buoyant than had been expected.  The subsequent concerns about climate changed doomed any hope of resurrection but as something of a consolation, AMG offered a 7.3 litre version of the V12.  Diana, Princess of Wales (1961-1997) died in the hire-car (S 280 with a 2.8 litre six) version of the W140.             

Pressed or pushed, many buttons needed.

The literal (physical) button-hole was noted in tailoring first during the 1560s, the figurative sense "to detain (someone) in unwillingly conversation” dating from 1862, a variation of the earlier button-hold (1834) and button-holder (1806), all based on the image is of holding someone by the coat-button so as to detain them.  The adjectival push-button ("characterized by the use of push-buttons) emerged in 1945 as a consequence of the increasingly electronic military systems then in wide deployment.  The earlier form “push-buttons" was from 1903, a modification of the noun push-button (button pressed with the finger to effect some operation) from 1865, then applied to mechanical devices.  The earlier adjectival form was “press-button” (1892) derived from the noun (1879).  For no apparent reason, it was the earlier “press of a button” which tended in the 1950s & 1960s to be preferred to “push of a button” to express the concern felt at the ease with which the US and USSR could trigger global thermo-nuclear war although “flick of a switch” also achieved much currency.  None were exactly usefully descriptive of a complex chain of events but it’s true in a nuclear launch, many buttons and switches are involved.

Button theory: Button theory suggests buttons can be done-up or undone.  Noted empiricist Lindsay Lohan has for some years been undertaking a longitudinal study to test theory.

Shapes, shades and sizes.

The fear of buttons is koumpounophobia, the construct being the Modern Greek κουμπί (koumpí) +‎ -phobia and the word, like many describing phobias is a neologism.  Koumpi was from the Ancient Greek κομβίον (kombíon) translates as button in its two literal senses (a fastener for clothing or a device for instrument or remote mechanical control).  A button in Greek is thus κουμπί (koumpí) (the plural κουμπιά) and the verb is κουμπώνω (koumpóno).  In the Ancient Greek the lexemic unit koump- didn’t exist although it did have κομβίον (kombíon (which exists in Modern Greek as komvíon)) which meant buckle.  It may seem as strange omission because Ancient Greek had κουμπούνω, (koumpouno) which meant “to button” but the root was κύαμος (komos or koumos) meaning “broad bean” and, because there were no buttons in the Greece of Antiquity, they used appropriately sized & shaped beans as clothes fasteners.  The construct of koumpouno (to button) koum(os) + + πονέω (poneo) (to work; to exert), the idea of a bean which is used again and again.  The suffix -phobia (fear of a specific thing; hate, dislike, or repression of a specific thing) was from the New Latin, from the Classical Latin, from the Ancient Greek -φοβία (-phobía) and was used to form nouns meaning fear of a specific thing (the idea of a hatred came later).

Lindsay Lohan in trench coat buttons up.  As fashionistas know, with a trench the belt is tied, only the military buckling up.

So, in the narrow technical sense, an etymologist might insist koumpounophobia is the fear of clothing fasteners rather than buttons of all types but that seems not helpful and it’s regarded as a generalised aversion and one said sometimes associated with kyklophobia (the fear of circles or other round objects) and especially the surprisingly common trypophobia (fear of holes (particularly if clustered or in some way arranged in a pattern)).  Estimates of the prevalence of the condition have been given by some but these are unverified and it’s not clear if those who for whatever reason prefer zips, Velcro or some other fastener are included and with phobias, numbers really should include only those where the aversion has some significant impact on life.  The symptoms suffered can include (1) an inability to tolerate the sight, sound, or texture of buttons, (2) feelings of panic, dread, or terror when seeing or thinking about buttons, (3) an acknowledgment that the fear is either wholly irrational or disproportionate to the potential danger.  Koumpounophobia reactions are usually automatic & uncontrollable and the source may be unknown or experiential (exposure to some disturbing imagery or description of buttons or an actual event involving buttons such as swallowing one when a child).  Like many phobias, the physical reactions can include a rapid heartbeat, shortness of breath, trembling, excessive sweating, nausea, dry mouth, inability to speak or think clearly, tightening of stomach muscles, and an overwhelming desire to escape from button-related situations.  All are likely to involve an anxiety attack to some extent and the recommended treatment is the staggered exposure therapy used for many phobias; the patient slowly learning to wear, use and live with buttons; antidepressants, tranquillisers & beta-blockers are now considered medications of last resort.

Buttons are hard to avoid.

What is sometimes treated as koumpounophobia can be a manifestation of a different phobia.  In the literature there are examples of buttons triggering anxiety when touched or viewed but the reaction was actually to texture, color or a resemblance to something (typically a face, mouth or teeth).  The button is thus incidental to the reaction in the same way that those with mysophobia (in popular use the germophobic) may react to buttons because of the association with uncleanliness.  One documented aspect of obsessive compulsive disorder (OCD) is that many sufferers immediately wash their hands after touching a button; the increased prevalence of this behaviour during the COVID-19 pandemic in relation to buttons touched by other (keyboards, elevators et al) is not thought indicative of a phobia but would be if it manifests as life-long behaviour.

Apple Magic Mouse, Multi-Touch Surface in white @ US$99.00 (left), Logitech Signature M650 L Full-size Wireless two-button Scroll Mouse with Silent Clicks in blue @ US$37.99 (centre) and Steve Jobs' vision of hell: Canon 5565B001 X Mark I Slim 3-in-1 wireless mouse with keypad calculator @ US$49.95. 

Steve Jobs (1955-2011; sometime co-founder, chairman & CEO of Apple) was said to have an aversion to buttons, something linked to his fondness for button-free turtleneck clothing but given he spent decades using keyboards without apparent ill-effect, it’s doubtful a clinician would diagnose koumpounophobia and it more likely he was just convinced of the technological advantages of going button-less.  Without buttons, manufacturing processes would be cheaper, water-proofing devices like iPhones would become (at least theoretically) possible and upgrades would no longer be constrained by static buttons, the user interface wholly virtualized on one flat panel.  It apparently started with the button-less Apple mouse, the industry legend being Mr Jobs saw a prototype (which the designers regarded as nothing more than speculative) and insisted it become Apple’s standard device.  Whether or not it happened that way, the story is illustrative of the way business was done at Apple and it’s notable his veto on offering a stylus with which to interact with apps or the operating system didn’t survive his death.  His response to the idea of a stylus was reportedly “yuk” and he seems to have decided all his users would think the same way and probably he was right, Apple’s users tending always to do what Apple tells them to do.  However, for those who find the sleek Apple mouse better to behold than use, third-party products with buttons and scroll wheels are available, sometimes for half the cost of the genuine article.

Shiny on the outside: Finished in Bianco Avus over black leather with Rosso Corsa (red) instruments, chassis 133023 (2003) is the only Ferrari Enzo the factory painted white.  Some Ferraris really suit white, notably the 365 GT4 2+2 and the successor 400 and 412 (1972-1989).

The dreaded “Ferrari sticky buttons” is a well-known phenomenon, the stickiness coming from the rubberized material preferred by the factory because of the superior feel offered.  However, under about any climatic conditions, continuous use will produce a deterioration which resembles melting, a mushiness the final outcome.  The internet is awash with suggestions, the simplest of which involves products like rubbing alcohol (the use of which can cause its own destructiveness) and the consensus seems to be that in many cases only replacement buttons will produce a satisfactory result.  The choice is between obtaining the real Ferrari part-number (if available) with the knowledge the problem will re-occur or use third-part replacements which are made of a more durable material, the disadvantage being the feel won’t be quite the same and there’s a reluctance among some to use non-factory parts.

Ferrari 485 California F1 gearbox buttons, sticky (left) and not (right).

Ferrari does use the suspect material for a reason and it’s applied to interior components such as trim, bezels, buttons & switches, and heating, ventilation & air-conditioning panels.  The coatings are usually referred to as “soft-touch” and designers like them for the soft, velvet-like feel imparted.  Used also on computer mouses and electronic remote controls, the low gloss sheen is also helpful in cars because being absorptive, glare is reduced and Ferrari uses them with both a clear and black finish.  It’s an issue actually not exclusive to Ferraris although owners of those do seem most concerned and while using rubbing alcohol might sound a tempting Q&D (quick & dirty) fix, for those with sticky buttons this is probably a job best left to experts of which there are now a few.

Protuberant

Protuberant (pronounced proh-too-ber-uhnt, proh-tyoo-ber-uhnt, or pruh-too-ber-uhnt)

Bulging out beyond the surrounding surface; protruding; projecting; swelling from the surrounding surface; bulging.

1640–1650: From the sixteenth century French protubérant (prominent beyond the surrounding surface), from the Late Latin protuberantem (nominative protuberans), present participle of prōtūberāre (to swell, bulge, grow forth), the construct being pro- (forward) + tuber (lump, swelling) from the primitive Indo-European root teue- (to swell).  The most common form in the Late Latin was prōtūberāre (to swell).  The verb protuberate (bulge out, swell beyond the adjacent surface) dates from the 1570s, from Late Latin protuberatus, past participle of prōtūberāre.  Protuberant is an adjective, protuberate is a verb, protuberance & protuberancy are nouns and protuberantly is an adverb.

Artwork not by PM&C.

In Australia, the Department of Prime-Minister & Cabinet (PM&C) recently released a new logo for the “Women’s Network”.  To the left of the construct was a cursive "W", the right stroke (the vertical diagonal line in a letter) adorned with a swash (a fancy or decorative replacement for a terminal or serif in an upper-case capital letter (although if the w is lower case (it’s hard to tell) this would be a flourish).  To the right was a capsular (technically a geometric stadium) protuberance which had been bitten into by the stylized W.  The logo’s graphical elements were rendered in a darkish purple which lightened to the right, the text below in two different sans serif fonts, one line in black, the other grey.  The design and placement of the text, though not obviously thoughtful, did at least add meaning to the graphic which might otherwise have been thought something to do with aubergines (eggplant).

Innocent interpretation: The aubergine (eggplant).

The logo proved to have a short life, withdrawn from circulation in response to complaints it resembled male genitalia; on Twitter, #logonono quickly trended.  Almost immediately the furor erupted, PM&C issued a statement saying the logo had been “removed” from its website “pending consultation with staff”.  Noting the phallic creation was part of a rebrand of staff DEI (diversity, equity and inclusion) networks “to establish a consistent look and feel” between the logos used for various groups, PM&C added “the Women’s Network logo retained a ‘W’ icon which staff had been using for a number of years” which seemed an unnecessary clarification given nobody had objected to the W.  Anxious to assure the country that whatever controversy might have been induced by the purple protuberance, PM&C announced the “…rebrand was completed internally, using existing resources, and designs were consulted on widely.  No external providers were engaged for this work… (and that) the prime minister and the prime minister’s office were not part of this logo design.”

Graphic designers do seem sometimes unaware of the levels of anatomical comparison their work offers.

The errors cut across cultures.  Here technical advice from an architect would have helped, a historically correct second minaret should have been added and only a single dome depicted.

The attitude of critics was exemplified by the National Older Women’s Network, which issued a statement describing the logo as “either thoughtless or an insult” although as a re-branding exercise, the project had to be labeled a success, most of the country now aware of the existence of the Women’s Network, a mysterious body previously familiar probably only to a few dozen.  A discussion of what it does or whether it fulfils any useful purpose wasn’t stimulated by the outcry over the offending logo so whatever the Women’s Network was doing before, it presumably continues to do.  One thing it achieved was to flush out the competition; it seems there are in the country a number of organizations with "Women's Network" in their title.

Developed in 1973 for the Archdiocesan Commission of Catholic Youth, this logo won an award.  It was a more innocent time.

Perhaps the men involved in the “Women’s Network” design didn’t notice the shape of the protuberance because they were focused on the color, anxious to avoid what might once have been the obvious choice: pink.  That would of course have been condescending and gender-stereotyping so PM&C deserve some praise for this mater in which they weren’t involved.  Pink stuff for products aimed at the female market may be less of a thing than once it was but pink stuff aimed at men wanting a gift with a difference for women seems more of a thing than ever, pink tool kits popular gifts with sales spiking reliably in the run up to Valentine’s Day.  It works for novelties like hammers and screwdrivers but doesn’t have a good record as a marketing device writ large, failure exemplified by the Dodge La Femme.

Chrysler show cars, 1954.  Chrysler Le Comte (his, top) & Chrysler La Comtesse (hers, bottom).

Chrysler offered the La Femme package in 1955 and 1956 on certain Dodge models, a creation that was not a stylistic whim but a response to sociological changes in an unexpectedly affluent post-war US society in which women were found to be exerting a greater influence on the allocation of their family’s rising disposable income and of most interest to Chrysler was that those increasingly suburban families were buying second cars, women getting their own.  Adventurous color schemes were nothing new to Detroit, the cars of the art deco era noted for their combinations but things had been more subdued in the years immediately after the Second World War.  That changed with the exuberance of 1950s experimentation, reflected in the colors of the La Femme concept which had been previewed in two of the cars Chrysler displayed during the 1954 show season.  The Le Comte & La Comtesse attracted most attention for their clear Perspex roofs (a craze at the time which didn’t last long as buyers found themselves slowly being cooked) but, following the grammatical conventions of their French definite articles, they were very much a “his & hers” brace, the darker (black & bronze) Le Comte with a “masculine” image and the La Comtesse, painted in  "Dusty Rose" & "Pigeon Grey", a softer and more “feminine” look.

Dodge La Femme (1955-1956).

The public and critical response was sufficiently positive to encourage production and for the 1955 model year, the La Femme option was offered on the Dodge Custom Royal Lancer two-door hardtop, finished in a two-tone combination of "Heather Rose".(a shade of pink) & "Sapphire White", highlighted with gold-colored "La Femme" badges in a display script.  If the exterior was (almost) subdued, the interior, a sea of pink, was femininity laid on with a trowel.  Trimmed in a tapestry fabric unique to the La Femme which wove pink rosebuds on a silver-pink background with pastel-pink vinyl, confronting those who sat there was a dashboard painted in a bright-pink lacquer.

In the pink: Dodge La Femme (1955-1956).

In a marketing ploy which turned out to be years ahead of its time, the La Femme also came with coordinated accessories, the centrepiece a pink calfskin handbag that fitted neatly into a storage compartment built into the back of the passenger’s seat, the shape of which included a scallop which meant the handbag’s escutcheon plate was visible, Dodge’s press-kits noting the brushed-metal was designed to permit the owner’s name to be engraved.  The handbag contained a compact, lipstick case, cigarette case, comb, cigarette lighter, and change purse, all made variously with faux-tortoiseshell or pink calfskin, both combined with anodized gold-tone metal.  In a matching compartment on the back of the driver’s seat was a rain coat, rain-cap and umbrella, all made with a vinyl patterned to match the rosebud interior fabric.  The design and production was by Evans of Chicago, a furrier and maker of fine accessories, famous for the display of "Black Diamond" mink coats in their flagship store at 36 South State Street.  Evans would later fall victim to the anti-fur movement which would lay waste to the industry.

Accessories by Evans of Chicago.

In toned-down form, the La Femme option re-appeared in 1956.  The external color combination was changed to a "Misty Orchid" & "Regal Orchid" scheme and the interior finish was simplified, the previous year’s tapestry fabric proving challenging to produce in volume.  The upholstery used a heavy white cloth with random patterns of short lavender and purple loops, matching the loop-pile carpeting and the accessories were fewer, restricted in 1956 to just the rain coat, rain cap and umbrella.  Over the two seasons, fewer than 2500 buyers chose the US$143 option and it didn’t re-appear for 1957.  Interestingly, (unverified) sources suggest at least three La Femme buyers chose the most powerful engine on the option list, Dodge’s D-500 (a 315 cubic inch (5.2 litre) V8 with hemi heads and a four-barrel carburetor); perhaps not all clung to 1950s gender stereotyping.

A simple solution.

Other manufacturers did offer feminine-themed cars in a similar vein including the pink Pontiac Parisienne, Chevrolet Impala Martinique, and Cadillac Eldorado Seville Baroness but none enjoyed much more success than the La Femme.  What in the US did find a receptive audience among women was the new generation of more compact cars introduced in the early 1960s, women sensibly drawn to something smaller than the standard-size US automobile which after 1957 grew to an absurdly inefficient size (to which men would continue to be attracted until economic reality bit in the 1970s.  Much later, there would be innovations in car design which women found genuinely helpful such as a hook on which a handbag could hang while remaining conveniently accessible and headrests which comfortably accommodate ponytails.

Detecting the protuberance of pregnancy: Ali Lohan (b 1993, left) photographed with her pregnant sister (right) wearing Sandal-Malvina Fringe Tank Dress in (unattributed) Dodge Yorange (left).  The shoes are Alexandre Birmen Clarita Platforms.

Leap

Leap (pronounced leep)

(1) To spring through the air from one point or position to another; to jump.

(2) Quickly or suddenly to move or act.

(3) To cause to leap.

(4) A spring, jump, or bound; a light, springing movement.

(5) The distance covered in a leap; distance jumped.

(6) A place leaped or to be leaped over or from.

(7) A sudden or abrupt transition.

(8) A sudden and decisive increase.

(8) In folk mythology, to copulate with or coverture of (a female beast) (archaic).

(9) In slang, to copulate with (a human) (archaic).

(10) A group of leopards.

(11) In figurative use, a significant move forward.

(12) In figurative use, a large step in reasoning (often one that is not justified by the facts, hence the sceptical phrase “a bit of a leap” & “quite a leap”).

(13) In mining (also used in geology), a fault.

(14) In aquatic management, a salmon ladder; a trap or snare for fish, historically constructed with fallen from twigs; a “weely”.

(15) In music, a passing from one note to another by an interval, especially by a long one, or by one including several other intermediate intervals.

(16) An intercalary measure, best-known as “leap year”, “leap second” et al.

(17) In pre-modern measures of weight, half a bushel.

Pre 900: From the Middle English lepen, from the Old English hlēapan, from the Proto-West Germanic hlaupan, from the Proto-Germanic hlaupaną (a doublet of lope, lowp, elope, gallop, galop, interlope and loop).  It was cognate with the German laufen (to run; to walk), the Old Norse hlaupa the Gothic hlaupan, the West Frisian ljeppe (to jump), the Dutch lopen (to run; to walk), the Danish løbe and the Norwegian Bokmål løpe, from the primitive Indo-European klewb- (to spring; stumble) (and may be compared with the Lithuanian šlùbti (to become lame) & klùbti (to stumble).  The verb forms are tangled things.  The third-person singular simple present tense is leaps, the present participle leaping, the simple past leaped or leapt (lept & lope the archaic forms) and the past participle is leaped or leapt or (lept & lopen the archaic forms).  That leapt and leaped remain in concurrent use is another of those annoy things in English which are hangovers from their ancient entrenchments in regional use and, as a general principle leapt tends to be is preferred educated British English while leaped is seen more frequently in North America (although leapt is in those places not uncommon, especially in areas with historical ties to England).  The transitive sense as in “pass over by leaping” was in use by the early fifteenth century and there are references to the children’s game “leap-frog” documented in the 1590s, and so obvious was the use of that figuratively it probably quickly was adopted but the first attested entry dates from 1704.  The familiar “to leap tall buildings in a single bound” comes from the Superman comics of the 1940s although in idiomatic use, “leaps” has been paired with “bounds” since at least since 1720.  Leap is a noun, verb & adjective, leaper & leapling are nouns and leaping and leapt & leaped are verbs; the noun plural is leaps.

The leap year is “a year containing 366 days” and use dates from late fourteenth century Middle English lepe gere, a genuine innovation because no equivalent term existed in the Old English. The origin is thought to come from the effect of fixed festival days, which normally advance one weekday per year, to “leap” ahead one day in the week.  The Medieval Latin was saltus lunae (omission of one day in the lunar calendar every 19 years), the Old English form being monan hlyp.  The adjustments happened in the calendars of many cultures, always with the purpose of ensuring the man-made devices for tracking dates (and therefore time) remained consistent with the sun; summer needed always to feel like summer and winter like winter.  Different methods of handling the intercalary were adopted and in England the bissextile was the device.  The noun & adjective bissextile (plural bissextiles) dates from the early 1580s and was from the Latin bisextilis annus (bissextile year), the construct being bisextus + -ilis, deconstructed as bis- (two; twice; doubled) + sextus (sixth) + dies (day) and was a reference to the Julian calendar's original reckoning of its quadrennial intercalary day as a 48-hour 24 February (subsequently distinguished as the two separate days of the sixth day before the March calends (sexto Kalendas Martii) and the “doubled sixth day”.  In modern use, 24 February is now understood as “five days before 1 March” but in Roman use it was called “the sixth” because the counting of dates was then inclusive.

Trace element of Leap Year: Lindsay Lohan in Irish Wish.

For those who understand the reference, Lindsay Lohan's new Netflix movie Irish Wish (2024) is said by Irish reviewers to be "a mix of Leap Year meets Just My Luck meets Freaky Friday in which Lohan stars as quiet book editor Maddie Kelly, who embarks on a journey to find love by learning to love herself first."  Like Irish Wish, Leap Year (2010) was filmed in Ireland.

The replacement of the bissextile by the then novel 29 February every four years-odd appears such an obviously good idea it seems strange it took centuries universally to be adopted in England although the documents reveal the shift was certainly well in progress by the mid-fifteenth century and in an echo of later practices, the more curmudgeonly the institution, the slower the intrusion of the new ways, the Admiralty and houses of parliament ignoring 29 February until well into the 1500s.  It wasn’t until the Calendar (New Style) Act (1750) passed into law that 29 February received formal recognition in UK law.  The reform worked well from the start but in some jurisdictions, government lawyers took no chances and for the handful of souls born on a 29 February, their birth dates were deemed to be 28 February or 1 March for all legal purposes (eligibility for drivers licenses or pensions, age of consent etc).  One born on 29 February is a “leapling” and there are said to be a few as five million of these lonely souls on the whole planet.  In many countries hospitals and midwives note the frequency with which expectant mothers approaching March request staff do whatever is required to avoid them giving birth to a leapling, fearing the child will feel deprived by having fewer birthdays than their siblings of friends.  The math of the leap year is it is one (1) evenly divisible by 4, (2) except for years are evenly divisible by 100 except that (3) years evenly divisible by 400 are leap years.  So, 2000 was while 1900 was not; 2100 will not be a leap year, but 2400 will be.  However, because the rotation of the Earth is changing (and thus the length of days), as is its distance from the Sun, even a 29 February now and then is not enough to keep everything in sync.  So, there are also leap seconds, spliced in as needed and unlike 29 February, only those dealing with atomic clocks and such notice addition.

Leap is common in idiomatic use:  To do something in “leaps and bounds” suggests commendably quick progress.  A “leap in the dark” is to take some action while being uncertain of consequences and the related “leap of faith” is trusting in something that cannot be seen or proven so in a sense they’re two ways of saying much the same thing although “leap of faith” does also imply some trust in something or someone.  To have one’s heart “leap into one’s throat” is an allusion to the sensation felt sometimes in the throat when something scary happens.  To “leap for joy” is much the same as “jump for joy” and describes joyous happiness.  To “leap at” something is enthusiastically to take up an offer, avail one’s self of an opportunity etc.  When doing so, one might be said to “leap into action”.  To be cautioned to “look before you leap” is to suggest one should be sure of things before doing something; if one ignores the advice then it’s a “leap of faith” or a “leap into the dark”.  To “leapfrog” is to skip a step in some process, the connotation almost always positive.  To suggest someone “take a flying leap” is much the same as telling them to “go jump in the lake” or, as is now more common: “fuck off”.  The concept of the "quantum leap" was in 1913 introduced (as the "quantum jump") by Danish physicist Niels Bohr (1885–1962) in his "Bohr model" of the atom.  In the strange world of quantum mechanics it describes the discontinuous change of the state of an electron in an atom or molecule from one energy level to another and was adopted figuratively to refer to an "abrupt, extreme change".  In modern use, it has come to mean a large or transformative change, a use to which pedants sometimes object but this is how the English language works.  The “leap year bug” is jargon rather than a idiom and describes the growing number of instances of problems caused by computers (and related machines) for whatever reason not correctly handling the existence of leap years.  Most are caused by human error and some are not being rectified because the original error has been built upon to such an extent that it’s easier to handle the bugs as they occur.  If something is said to be “a bit of a leap” or “quite a leap” it means there's some scepticism about the relationship one thing and another (often cause & effect). 

Jaguar's Leaper

Leaper on 1960 Jaguar Mark 2.

The “Leaper” was the factory’s name for the leaping feline figure which for decades adorned the space atop or behind the grill on many Jaguars.  These embellishments were originally mere functional devices because they were literally the external radiator caps so the most important part of the design was that easily they could be unscrewed to allow coolant to be added.  Inevitably, the possibilities occurred to stylists (as such designers used to be called) and the once modest radiator cap became miniature (though many were anything but small) works of art to covey the image the manufacturer wished.  Jaguar’s founder, Sir William Lyons (1901–1985), had a eye for style and was appalled at some of the after-market ornaments being sold to some of the buyers of his SS (Standard Swallow) Jaguars in the pre-war years so commissioned his own, the company legend being there was an amateur sculptor on the staff who got the job.  Beginning in 1938, this became the Jaguar standard and it adorned the cars until 1951 although it didn’t appear on the XK120 which caused such a sensation at the 1948 London Motor Show, apparently because that car was such a flourish of modernity the inclination was to abandon such antiquated relics.  So, when the Jaguar Mark V was retired in 1951, so was the leaper.

The Jaguar leaper had teeth which sounds ominous for pedestrians but some of the hood emblems looked more lethal still.  Left to right (top row): Buick, Packard & Pierce-Arrow; (centre row): Rolls-Royce, Bentley & Mercury; (bottom row): Duesenberg, Mercedes-Benz & Nash.

Whether nostalgia overtook the factory or there was popular demand seems not to have been recorded but in 1955 the leaper leapt back onto the Jaguar saloons (though not the sports cars) and it was sleeker still, the back legs now outstretched and because radiators were now hidden behind grills, the leaper was fixed to the bonnet (hood) and this shape would be used until 1969, offered even as an option on the XK150.  A smaller version was fashioned for the long, low & wide Mark X in 1961 and it was in use until 1970 when the 420G was retired.  That seemed to be the end of the line for the leaper because one wasn’t included when the new XJ range was released in 1968 (they are however a popular after-market fitting).

1976 Jaguar XJC 4.2.

This XJC is one of many in the wild which, at some point, was fitted with a leaper but its a shame whoever made the addition didn't at the same time remove the unfortunate vinyl roof.  The leaper badges on the flanks (behind the front wheel arch) were factory-fitted on the Series 1 (1968-1973) & Series 2 (1973-1979) XJs and the 1000-odd E-Types in the so-called "R2" run (almost all of which were registered as 1971 models although some left the factory in 1970.

1971 S2 Jaguar E-Type (centre) from the "R2" run of 1000-odd with the leaper badges on the flanks.

So much did the clutter created by bigger bumpers, protuberant headlight assemblies, badges and side-marker lights detract from the lovely, sleek lines of the Series 1 cars, bolting a luggage rack to the boot (trunk) probably seemed no longer the disfigurement it would once have been.  The left-hand (left) and right-hand (right) badges, being directional, were different part numbers (BD35865 & BD35866 respectively) and those used on E-Types were silver on black.  There were also variants used on the XJs which were gold on black and some had the leaping feline at a slight slope, both matters of note for those wishing to restore to the challenging "factory original" standard.   

Leaper on a US market 1999 Jaguar Vanden Plas (X308).

The US market Vanden Plas were the only Jaguars on which the leaper was used in conjunction with the fluted grill fitted to the home market (and some RoW (rest of the world)) Daimlers.  Because it was Mercedes-Benz and not Jaguar which held the US rights to the Daimler brand, Daimlers sold in the US were badged as Jaguar Vanden Plas although they were otherwise identical to Daimlers including the fluted fittings.  The supercharged Daimler Vanden Plas was the most exclusive of the X308s and was noted for details such as the rear picnic tables being crafted from solid burl walnut timber rather than the veneer over plastic used on cheaper models.

However, while Jaguar’s designers were convinced, the buyers were not and the leaper remained a popular after-market fitting on both the XJs (where it looked OK because of the car’s resemblance to the earlier generations) and the XJ-S (where frankly, it looked absurd).  Notably, demand for the return of the leaper was strong in the US and in response, the factory relented and a “safe” version was developed to please the safety-conscious American regulators, using a spring-loaded mechanism similar to the one Mercedes-Benz used for its three-pointed star, a variation later perfected to conform with European legislation governing “the external projections of motor vehicles”.  The end for the leaper finally came in 2005 although the profile lives on in a boot (trunk) badge used on modern Jaguars (including the ones which look like big Hyundais).