uniformity (n.)youdaoicibaDictYouDict
early 15c., from Old French uniformite (14c.) or directly from Late Latin uniformitatem (nominative uniformitas) "uniformity," from Latin uniformis (see uniform (adj.)).
unify (v.)youdaoicibaDictYouDict
c. 1500, "to make into one," from Middle French unifier (14c.) or directly from Late Latin unificare "make one," from Latin uni- "one" (see uni-) + root of facere "to make" (see factitious). Related: Unified; unifying. Unified (field) theory in physics is recorded from 1935.
unilateral (adj.)youdaoicibaDictYouDict
1802, from Modern Latin unilateralis, from unum, neuter of unus "one" (see one) + latus (genitive lateralis) "side" (see oblate (n.)). Jeremy Bentham (1748-1832) may have been the first to use it in the legal sense of "made or entered into by one party." Related: Unilaterally. Unilateral disarmament is recorded from 1929.
It is useless for the sheep to pass resolutions in favor of vegetarianism, while the wolf remains of a different opinion. [William Ralph Inge, "Outspoken Essays," 1919]
unilateralism (n.)youdaoicibaDictYouDict
1926, from unilateral + -ism. Earliest usages seem to be in the sense of "advocate of unilateral disarmament." Meaning "pursuit of a foreign policy without allies" is attested by 1964.
unimaginable (adj.)youdaoicibaDictYouDict
1610s, from un- (1) "not" + imaginable. Related: Unimaginably.
unimaginative (adj.)youdaoicibaDictYouDict
1802, from un- (1) "not" + imaginative.
unimpaired (adj.)youdaoicibaDictYouDict
1580s, from un- (1) "not" + past participle of impair (v.). Rare before c. 1760.
unimpeachable (adj.)youdaoicibaDictYouDict
1784, from un- (1) "not" + impeachable. Related: Unimpeachably.
unimpeded (adj.)youdaoicibaDictYouDict
1760, from un- (1) "not" + past participle of impede (v.).
unimportance (n.)youdaoicibaDictYouDict
1751; see unimportant + -ance.
unimportant (adj.)youdaoicibaDictYouDict
1750, from un- (1) "not" + important (adj.). Used earlier in a sense of "unassuming, modest" (1727). Related: Unimportantly.
unimposing (adj.)youdaoicibaDictYouDict
"unimpressive," 1809, from un- (1) "not" + imposing.
unimpressed (adj.)youdaoicibaDictYouDict
1861, "not awed," from un- (1) "not" + past participle of impress (v.). Used earlier in a sense of "not subjected to restraint" (1743). Unimpressive is recorded from 1796.
unimproved (adj.)youdaoicibaDictYouDict
1660s, "not made better," from un- (1) "not" + past participle of improve (v.). Sense of "not developed or taken advantage of" (of land) is recorded from 1781.
unincorporated (adj.)youdaoicibaDictYouDict
1715, from un- (1) "not" + past participle of incorporate (v.).
uninflected (adj.)youdaoicibaDictYouDict
1713, from un- (1) "not" + past participle of inflect (v.).
uninfluenced (adj.)youdaoicibaDictYouDict
1734, from un- (1) "not" + past participle of influence (v.).
uninformed (adj.)youdaoicibaDictYouDict
1590s, from un- (1) "not" + past participle of inform. Originally in reference to some specific matter or subject; general sense of "uneducated, ignorant" is recorded from 1640s.
uninhabitable (adj.)youdaoicibaDictYouDict
mid-15c., from un- (1) "not" + inhabitable.
uninhabited (adj.)youdaoicibaDictYouDict
1570s, from un- (1) "not" + past participle of inhabit (v.).