Etymology
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fylfot (n.)

supposedly a native name for the swastika (used as a decorative device), but only attested in a single, damaged c. 1500 manuscript, and in that it might rather refer to any sort of device used to fill the bottom (foot) of a design. "[I]t is even possible that it may have been a mere nonce-word" [OED].

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tedium (n.)

"tediousness," 1660s, from Latin taedium "weariness, irksomeness, disgust" (mostly post-classical), which is related to taedet "it is wearisome, it excites loathing" (in Late Latin "be disgusted with, be weary of") and to taedere "to weary," but the whole group is of uncertain etymology. Possible cognates are Old Church Slavonic težo, Lithuanian tingiu, tingėti "to be dull, be listless."

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rack-rent (n.)

"extortionate rent, rent raised to the highest possible limit, rent greater than any tenant can be expected to pay," especially of land-rents in Ireland, c. 1600, from rent (n.) + rack (v.1) in the otherwise obsolete sense of "extort or obtain by rapacity, raise (rent, etc.) above a fair level" (1550s).

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Jeffersonian 

1799 (n.), 1800 (adj.), in reference to the politics and policies of U.S. politician and statesman Thomas Jefferson, first great leader of the Democratic Party and president 1801-09. The surname, literally "son of Geoffrey," is attested from mid-14c.; in Middle English also Jeffrison, Geffreysone, Geffrason. Jeffersonianism is from 1804 in reference to the political beliefs of Thomas Jefferson; often it means advocacy of the greatest possible individual and local freedom and corresponding restriction of the national government.

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point man (n.)

"one who leads a military patrol in formation in a jungle, etc.," 1944, said to be from point (n.) in military sense of "small leading party of an advance guard" (1580s) + man (n.). A more literal sense also is possible. Point (n.) in U.S. also meant "position at the front of a herd of cattle," and pointman in this sense is attested by 1903.

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ultimatum (n.)

"final demand," 1731, from Modern Latin, from Medieval Latin ultimatum "a final statement," noun use of Latin adjective ultimatum "last possible, final," neuter of ultimatus (see ultimate). The Latin plural ultimata was used by the Romans as a noun, "what is farthest or most remote; the last, the end." In slang c. 1820s, ultimatum was used for "the buttocks."

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honky (n.)

also honkey, derogatory word for "white person," by 1967, African-American vernacular, of unknown origin, perhaps from late 19c. hunky "East-Central European immigrant," which probably is a colloquial shortening of Hungarian (compare hunk (n.2)). Honky in the sense of "factory hand" is attested by 1946 in blues slang. A connection to honky-tonk also is possible.

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lathe (n.)

"machine for turning wood, etc., so it can be worked by a tool held at rest," early 14c., of uncertain origin, probably from a Scandinavian source. OED compares Danish drejelad "turning-lathe;" other compounds with the element suggest a sense "framework, supporting structure." Others see a possible connection to Old Norse hloeða "to lade, load, saddle (a horse)."

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problematic (adj.)

c. 1600, "doubtful, questionable, uncertain, unsettled," from French problematique (15c.), from Late Latin problematicus, from Greek problēmatikos "pertaining to a problem," from problēmatos, genitive of problēma (see problem).

Specific sense in logic, differentiating what is possible from what is necessarily true, is from 1610s. The sense of "constituting, containing, or causing a difficulty" is modern, probably from a noun use in sociology (1957). Related: Problematical (1560s); problematically.

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alacrity (n.)

"liveliness, briskness," mid-15c., from Latin alacritatem (nominative alacritas) "liveliness, ardor, eagerness," from alacer (genitive alacris) "cheerful, brisk, lively;" a word of uncertain origin. Perhaps cognate with Gothic aljan "zeal," Old English ellen "courage, zeal, strength," Old High German ellian. But de Vaan suggests the root sense is "to wander, roam" and sees a possible connection with ambulare.

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