Indefatigable (pronounced in-di-fat-i-guh-buhl)
Incapable of being tired out; not yielding to
fatigue; untiring.
1580-1590: From the French indefatigable, from the Latin indēfatīgābilis (untiring; that which cannot be wearied). The construct was in (in the sense of "not") + defatigare (to tire out) from de- (utterly, down, away) + fatigare (to weary). A dictionary of 1656 has an entry for defatigable which does seem to have been used in the seventeenth century before going extinct; a revival in 1948 was a jocular back-formation (a la "gruntled" or "combobulated") from indefatigable and one which never caught on. Indefatigable is an adjective, indefatigableness & indefatigability are nouns and indefatigably is an adverb; the noun plural is indefatigabilities. It seems indefatigable may have been a back-formations of the adverb indefatigably, the latter recorded as being in use in the mid-sixteenth century.
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HMS Indefatigable, a Royal Navy battlecruiser launched in 1909 and sunk while part of Vice-Admiral Sir David Beatty's (1871-1936) battlecruiser fleet in the 1916 Battle of Jutland. Santa Cruz Island, the most populous and second-largest island in Ecuador's Galápagos Islands is also known as Indefatigable Island, the Admiralty bestowing the name in honor of HMS Indefatigable, a ship of the line with a distinguished battle record during Napoleonic Wars and later saw service in the Royal Navy's South America squadron.
Battlecruisers were essentially battleships with less armor, therefore gaining speed at the cost of greater vulnerability. The theory was they would have the firepower to out-gun all but the battleships and those they could out-run with their greater speed. The concept seemed sound and in December 1914, at the Battle of the Falkland Islands, two Royal Navy battlecruisers vindicated the theory when they chased and destroyed the German East Asia Squadron. However, in 1916, the performance of the battlecruisers in the Jutland engagement forced the Admiralty to re-consider. Jutland was the closest thing to the great battle of the fleets which had been anticipated for decades but proved anti-climatic, both sides ultimately choosing to avoid the decisive encounter which offered the chance of victory or defeat. What it did prove was that the naval theorists had been right; the battlecruiser could not fight the battleship and if their paths threatened to cross, the less-armored vessel should retreat and rely on greater speed to make good her escape. There were technical deficiencies in the British ships, without which perhaps three of their battlecruisers wouldn’t have been lost, but what happened at Jutland made it clear to the admirals that uneven contests between the big capital ships were to be avoided.
For naval architects, warship design was a three-way tussle between speed, firepower and armor; to add to one was to detract from at least one of the others. That was difficult enough when constrained only by physics and economics but after the First World War, international agreements limited the maximum tonnage of the big ships so the choice became either to compromise the design or cheat. Some countries did the former, some the latter but all seemed to agree the battlecruiser was extinct and indeed, after Jutland, no battlecruiser was laid down for over sixty years. The pocket-battleships of the 1930s, although similar, were a different breed.
Before the fall: Soviet nuclear-battlecruiser Kirov at anchor in the Baltic, a Krivak I-class guided-missile frigate in the background, December, 1989. Later re-named the Admiral Ushakov, she and the Admiral Lazarev (ex-Frunze) are now in the throes of being scrapped.
It was thus a surprise when the Soviet navy announced the commissioning of five Kirov class battlecruisers, four of which were built, launched during the 1980s and 1990s. Although the official Russian designation of the ship-type is heavy nuclear-powered guided missile cruiser (тяжёлый атомный ракетный крейсер), admiralties in the West, still nostalgic about the big ships, choose to revive the old name "battlecruisers". They’re the largest conventional warships launched since World War II; only aircraft carriers and amphibious assault ships have been of greater displacement. Expensive to operate, only the Pyotr Velikiy (ex-Yuriy Andropov) remains in operational service and, according to recent NATO bulletins, she has been at sea as part of a fleet exercise as recently as mid-2021. Although the Admiral Nakhimov (ex-Kalinin) is currently undergoing a refit and is now scheduled to re-enter service in 2023, the re-commissioning date has shifted many times and NATO sources remain sceptical she will ever return to the active list.
Many adjectives have been applied to Lindsay Lohan; indefatigable is probably under-used.
