英语词源字典 - 在线词源网站

USA [USA 词源字典]: also U.S.A., abbreviation of United States of America, in use by 1814 in addresses, etc.; not common otherwise before c. 1920. Before then it often also meant United States Army.[USA etymology, USA origin, 英语词源]
usable (adj.): late 14c., from Old French usable "available, in use" (14c.), from user (see use (v.)). Not a common word before c. 1840, when probably it was re-formed from use (v.) + -able. Related: Usably.
usage (n.): c. 1300, "established practice, custom," from Anglo-French and Old French usage "custom, habit, experience; taxes levied," from us, from Latin usus "use, custom" (see use (v.)). From late 14c. as "service, use, act of using something."
usb: initialism (acronym) for universal serial bus, by 1994.
use (v.): c. 1200, "employ for a purpose," from Old French user "employ, make use of, practice, frequent," from Vulgar Latin *usare "use," frequentative form of past participle stem of Latin uti "make use of, profit by, take advantage of, enjoy, apply, consume," in Old Latin oeti "use, employ, exercise, perform," of uncertain origin. Related: Used; using. Replaced Old English brucan (see brook (v.)). From late 14c. as "take advantage of."
use (n.): c. 1200, "act of employing," from Anglo-French and Old French us "custom, practice, usage," from Latin usus "use, custom, practice, employment, skill, habit," from past participle stem of uti (see use (v.)).
used (adj.): "second-hand," 1590s, past participle adjective from use (v.). To be used to "accustomed, familiar" is recorded by late 14c. Verbal phrase used to "formerly did or was" (as in I used to love her) represents a construction attested from c. 1300, and common from c. 1400, from use (intransitive) "be accustomed, practice customarily," but now surviving only in past tense form. The pronunciation is affected by the t- of to. Used-to-be (n.) "one who has outlived his fame" is from 1853.
useful (adj.): 1590s, from use (n.) + -full. Related: Usefully; usefulness.
useless (adj.): 1590s, from use (n.) + -less. Related: Uselessly; uselessness.
user (n.): c. 1400, agent noun from use (v.). Of narcotics, from 1935; of computers, from 1967. User-friendly (1977) is said in some sources to have been coined by software designer Harlan Crowder as early as 1972.
username (n.): by 1982, from user + name (n.).
usher (n.): late 13c., "servant who has charge of doors and admits people to a chamber, hall, etc.," from Anglo-French usser (12c.), Old French ussier, uissier "porter, doorman," from Vulgar Latin *ustiarius "doorkeeper," variant of Latin ostiarius "door-keeper," from ostium "door, entrance," from os "mouth," from PIE *os- "mouth" (see oral). Fem. form usherette is attested from 1913, American English.
usher (v.): 1590s, "conduct, escort, admit ceremoniously," from usher (n.). Related: Ushered; ushering.
USSR: also U.S.S.R., initialism (acronym) of Union of Soviet Socialist Republics, by 1926.
Ustashi: Croatian separatise movement, 1932, from Croatian Ustaše, plural of Ustaša "insurgent, rebel."
usual (adj.): late 14c., from Old French usuel "current, in currency (of money), valid" (13c.) and directly from Late Latin usualis "ordinary," from Latin usus "custom" (see use (v.)). The usual suspects is from a line delivered by Claude Rains (as a French police inspector) in "Casablanca" (1942).
usually (adv.): late 15c., from usual + -ly (2).
usufruct (n.): "right to the use and profits of the property of another without damaging it," 1610s (implied in usufructuary), from Late Latin usufructus, in full usus et fructus "use and enjoyment," from Latin usus "a use" (see use (n.)) + fructus "enjoyment," literally "fruit" (see fruit). Attested earlier in delatinized form usufruit (late 15c.).
usurer (n.): late 13c., "one who lends money at interest," but later especially "one who lends money at an exorbitant rate of interest," from Anglo-French usurer, Old French usurier, usureor, from Medieval Latin usurarius "money-lender, usurer," from Latin usurarius (adj.) "pertaining to interest; that pays interest," from usura (see usury).
usurious (adj.): c. 1600, from usury + -ous. Related: Usuriously.