英语词源字典 - 在线词源网站

unearned (adj.)[unearned 词源字典]: c. 1200, from un- (1) "not" + past participle of earn (v.). Unearned income is recorded from 1889.[unearned etymology, unearned origin, 英语词源]
unearth (v.): "to dig up," mid-15c., from un- (2) "opposite of" + earth (v.) "bury (a corpse) in the ground" (c. 1400, from earth (n.)). Related: Unearthed; unearthing.
unearthly (adj.): 1610s, "heavenly, sublime," from un- (1) "not" + earthly. Sense of "ghostly, weird" first recorded 1802. Related: Unearthliness.
uneasy (adj.): late 13c., "not comforting, causing trouble," from un- (1) "not" + easy (adj.). Meaning "disturbed in mind" is attested from 1670s. Related: Uneasily; uneasiness.
uneducated (adj.): 1580s, from un- (1) "not" + past participle of educate (v.).
unelectable (adj.): also un-electable, 1962, from un- (1) "not" + electable.
unemancipated (adj.): 1775, from un- (1) "not" + past participle of emancipate (v.).
unemotional (adj.): 1819, from un- (1) "not" + emotional (adj.). Related: Unemotionally.
unemployed (adj.): 1600, "at leisure, not occupied," from un- (1) "not" + past participle of employ (v.). Meaning "temporarily out of work" is from 1660s. The noun meaning "unemployed persons collectively" is from 1782.
No man has hired us
With pocketed hands
And lowered faces
We stand about in open places
And shiver in unlit rooms ...

[T.S. Eliot, "Choruses from the Rock"]
unemployment (n.): 1887, from un- (1) "not" + employment.
unencumbered (adj.): 1722, from un- (1) "not" + past participle of encumber (v.).
unending (adj.): 1660s, from un- (1) "not" + present participle of end (v.).
unendurable (adj.): 1620s, from un- (1) "not" + endurable. Related: Unendurably.
unenlightened (adj.): 1660s, "not lit up," from un- (1) "not" + past participle of enlighten (v.). Meaning "not mentally illuminated" is attested from 1650s.
unenthusiastic (adj.): 1805, from un- (1) "not" + enthusiastic (adj.). Related: Unenthusiastically.
unenviable (adj.): 1640s, from un- (1) "not" + enviable (adj.). Related: Unenviably.
unequal (adj.): 1530s, "unjust, unfair," from un- (1) "not" + equal (adj.). Meaning "not the same in amount, size, quality, etc." is recorded from 1560s (inequal in this sense is from late 14c.). Sense of "inadequate, insufficient" (to some task) is attested from 1690s. Related: Unequally.
unequivocal (adj.): 1784, from un- (1) "not" + equivocal. Related: Unequivocally.
unerring (adj.): 1640s (implied in unerringly), from un- (1) "not" + verbal noun from err. Related: Unerringly.
UNESCO: acronym from United Nations Educational, Scientific and Cultural Organization, which was created in 1945.