英语词源字典 - 在线词源网站

unfamiliar (adj.)[unfamiliar 词源字典]: 1590s, from un- (1) "not" + familiar (adj.). Related: Unfamiliarly; unfamiliarity.[unfamiliar etymology, unfamiliar origin, 英语词源]
unfamous (adj.): late 14c., "not well known, obscure," from un- (1) "not" + famous (adj.). Also from late 14c. as "notably bad," a sense now in infamous.
unfashionable (adj.): 1560s, "incapable of being shaped," from un- (1) "not" + fashionable. Meaning "not in accordance with prevailing fashion" is attested from 1640s. Related: Unfashionably.
unfasten (v.): early 13c., from un- (2) "opposite of" + fasten. Old English had unfæstnian "to unfasten." Related: Unfastened; unfastening.
unfathomable (adj.): 1610s, originally in the figurative sense, of feelings, conditions, etc., from un- (1) "not" + fathomable. Literal sense attested from 1670s. Related: Unfathomably.
unfathomed (adj.): 1620s, from un- (1) "not" + past participle of fathom (v.).
unfavorable (adj.): also unfavourable, mid-15c. (implied in unfavorably), from un- (1) "not" + favorable (adj.).
"We must not indulge in unfavorable views of mankind, since by doing it we make bad men believe that they are no worse than others, and we teach the good that they are good in vain." [Walter Savage Landor, "Imaginary Conversations"]
unfazed (adj.): 1933, American English, from un- (1) "not" + past participle of faze (v.).
unfeasible (adj.): 1520s, from un- (1) "not" + feasible.
unfeeling (adj.): late Old English had unfelende, "having no sensation." Middle English had a verb unfeel "be insensible, fail to feel" (early 14c.) as well as unfeelingness "insensibility, loss of sensation," and unfeelingly "without understanding or direct knowledge" (late 14c.), and a verbal noun unfeeling "loss of sensation, lack of feeling." However the word in its main modern meaning "devoid of kindly or tender feelings" is from 1590s, from un- (1) "not" + past participle of feel (v.). Related: Unfeelingly.
unfeigned (adj.): late 14c., "sincere, genuine, true, real," from un- (1) "not" + past participle of feign (v.).
unfelt (adj.): 1580s, from un- (1) "not" + past participle of feel (v.).
unfetter (v.): mid-14c., from un- (2) "opposite of" + fetter (v.). The figurative sense is recorded from late 14c. Related: Unfettered; unfettering.
unfinished (adj.): 1550s, from un- (1) "not" + past participle of finish (v.).
unfit (adj.): 1540s, "not suitable" (in reference to things), from un- (1) "not" + fit (adj.). Related: Unfitness. In reference to persons or human qualities, attested from 1550s.
unfit (v.): "to render unfit," 1610s, from unfit (adj.), or else from un- (2) "reverse of" + fit (v.). Related: Unfitted; unfitting.
unflagging (adj.): 1715, from un- (1) "not" + present participle of flag (v.). Related: Unflaggingly.
unflappable (adj.): 1958, from un- (1) "not" + flap (v.) + -able. Originally used in reference to Harold Macmillan, British P.M. 1957-63.
unflattering (adj.): 1580s, from un- (1) "not" + gerundive of flatter. Related: Unflatteringly.
unfledged (adj.): c. 1600, of persons, "immature, not experienced," from un- (1) "not" + past participle of fledge (v.). Literal sense of "not yet covered in feathers" is recorded from 1610s.