unstressed (adj.)
1879, from un- (1) "not" + past participle of stress (v.)....
unwind (v.)
early 14c., "to undo" (a bandage, wrapping, etc.), from un- (2) "opposite of" + wind (v.1). Similar formation in Old English unwindan "unveil, uncover," Dutch ontwinden, Old High German intwindan. Reflexive sense is recorded from 1740; figur...
unwary (adj.)
by 1570s, possibly late 14c., from un- (1) "not" + wary (adj.). Old English had unwr "incautious," unwrlic. Related: Unwarily....
untwist (v.)
1530s, from un- (2) "reverse, opposite of" + twist (v.). Related: Untwisted; untwisting....
unturned (adj.)
1540s, from un- (1) "not" + past participle of turn (v.)....
untruth (n.)
Old English untreow "unfaithfulness, treachery," from un- (1) "not" + truth (n.). Similar formation in Old Norse utryg. Meaning "falsehood" is attested from mid-15c., as is that of "a lie." Related: Untruthful....
untrustworthy (adj.)
1846, from un- (1) "not" + trustworthy. Related: Untrustworthiness....
untrue (adj.)
Old English untreowe "unfaithful" (of persons), from un- (1) "not" + true (adj.). Similar formation in Middle Dutch ongetrouwe, Middle Low German ungetruwe, Old High German ungitriuwi, Old Norse utryggr. Meaning "contrary to facts" is attest...
untroubled (adj.)
late 15c., from un- (1) "not" + past participle of trouble (v.)....
untrodden (adj.)
c.1300, from un- (1) "not" + past participle of tread (v.)....
usurp (v.)
early 14c., from Old French usurper "to (wrongfully) appropriate" (14c.), from Latin usurpare "make use of, seize for use," in later Latin "to assume unlawfully, trespass on," from usus "a use" (see use (v.)) + rapere "to seize" (see rapid (...
unwise (adj.)
Old English unwis, from un- (1) "not" + wise (adj.). Similar formation in Middle Dutch onwijs, Old High German unwis, German unweise, Old Norse uviss, Gothic unweis....
untried (adj.)
1510s, "not proven or tested," from un- (1) "not" + tried....
untreatable (adj.)
late 14c., "unmanageable," from un- (1) "not" + treatable (see treat (v.)). In medicine, of diseases, conditions, etc., by 1865....
untenanted (adj.)
1670s, from un- (1) "not" + tenanted (see tenant (n.))....
untilled (adj.)
late 13c., from un- (1) "not" + past participle of till (v.)....
untrammeled (adj.)
also untrammelled, 1795, from un- (1) "not" + past participle of trammel (v.)....
untenable (adj.)
1640s, "indefensible, incapable of being held against attack," from un- (1) "not" + tenable (adj.). Figurative sense is recorded from 1690s....
until (prep.)
c.1200, from till (prep.). The first element is un- "as far as, up to" (also in unto), from Old Norse *und "as far as, up to," from Proto-Germanic *und- (cognates: Old English o "up to, as far as," Old Frisian, Old Saxon, Gothic und), from P...
untie (v.)
Old English untigan "loosen, unchain," from un- (2) "opposite of" + tie (v.). Related: Untied; untying....
untempered (adj.)
mid-15c., "not properly mixed, undiluted," from un- (1) "not" + past participle of temper (v.). Similar formation in Middle Dutch ongetempert, Middle High German ungetempert. Earlier as "unrestrained" (late 14c.), also, of a musical instrume...
untrained (adj.)
1540s, from un- (1) "not" + past participle of train (v.)....
untaught (adj.)
mid-14c., "not instructed or educated," from un- (1) "not" + taught. Hence "spontaneous, natural" (mid-15c.)....
untoward (adj.)
1520s, "not having inclination" (to or for something), also "difficult to manage, unruly," from un- (1) "not" + toward (adj.)....
untidy (adj.)
early 13c., "untimely, unseasonable, unsuitable," from un- (1) "not" + tidy (adj.). Similar formation in West Frisian ontidich, Middle Dutch ontidich, Dutch ontijdig, Old High German unzitich, German unzeitig, Norwegian utidig "untimely, uns...
untapped (adj.)
1775, from un- (1) "not" + past participle of tap (v.). Figurative use from c.1890....
untouched (adj.)
late 14c., "not been physically contacted," from un- (1) "not" + past participle of touch (v.). Meaning "unharmed, uninjured" is from c.1400; that of "not used at all" is from 1530s; sense of "unmoved emotionally" is from 1610s....
unthrifty (adj.)
late 14c., "unprofitable, useless," from un- (1) "not" + thrifty (adj.), or else from Middle English noun unthrift "profligacy," late 14c., earlier "evil practice, wicked act" (c.1300)....
untangle (v.)
1540s, from un- (2) "reverse, opposite of" + tangle (v.). Related: Untangled; untangling....
untouchable (adj.)
1560s, "immaterial," from un- (1) "not" + touchable (see touch (v.)). Meaning "that legally cannot be interfered with" is recorded from 1734. Meaning "too loathsome or defiling to be touched" is recorded from 1873. The noun, in reference to...
unthinking (adj.)
1670s, "unreflecting;" 1680s, "heedless," from un- (1) "not" + present participle of think (v.)....
untold (adj.)
Old English unteald, "not counted or reckoned," from un- (1) "not" + past participle of tell (v.) in its original numerical sense. Similar formation in Middle Dutch ongetellet, German ungezahlt, Old Norse utalir. Meaning "not related or reco...
unthinkable (adj.)
early 15c., "too large to be conceived, unimaginable," from un- (1) "not" + think (v.) + -able. Meaning "incapable of being framed by thought" is recorded from mid-15c....
untangible (adj.)
1775, from un- (1) "not" + tangible (adj.)....
unto (prep.)
mid-13c., perhaps a modification of until, with southern to in place of northern equivalent till. Or perhaps a contraction of native *und to, formed on the model of until from Old English *un- "up to, as far as," cognate of the first element...
unthaw (v.)
1590s, "to thaw," from un- (2) "opposite of" + thaw (v.). Related: Unthawed; unthawing. Unthawed also sometimes is used with a sense "frozen" (1610s.)....
untamed (adj.)
mid-14c., from un- (1) "not" + past participle of tame (v.). Similar formation in Old English untemed, Old Norse utamdr, Old High German ungizamot....
untitled (adj.)
1610s, "unnamed," from un- (1) "not" + past participle of title (v.). Meaning "having no right" is from 1660s; that of "undistinguished by an aristocratic title" is from 1798....
untethered (adj.)
1775, past participle adjective from untether (v.)....
untainted (adj.)
1580s, in the moral sense; c.1600 in the physical sense; from un- (1) "not" + past participle of taint (v.). Earlier was untained (mid-15c.), from a Middle English variant of taint (v.)....
untether (v.)
1775, from un- (2) "reverse, opposite of" + tether (v.). Related: Untethered; untethering....
unsystematic (adj.)
1770, from un- (1) "not" + systematic (adj.)....
untimely (adj.)
1530s, "coming before the proper or usual time," from un- (1) "not" + timely (adj.). Similar formation in Middle Danish utimelig, of weather, etc. Old English had untidlic "unseasonable." Related: Untimeliness....
unsympathetic (adj.)
1785, from un- (1) "not" + sympathetic (adj.)....
unsure (adj.)
c.1400, "not safe against attack," also "lacking certainty," from un- (1) "not" + sure (adj.)....
unswerving (adj.)
1690s, from un- (1) "not" + present participle of swerve (v.)....
unsupported (adj.)
early 15c., from un- (1) "not" + past participle of support (v.)....
unsweetened (n.)
1775, "not having been sweetened," from un- (1) "not" + past participle of sweeten (v.); or else, if the sense is "with sweetness removed," from unsweeten (v.), which is attested from 1610s....
unsupervised (adj.)
1845, from un- (1) "not" + past participle of supervise (v.)....
unswayed (adj.)
1590s, from un- (1) "not" + past participle of sway (v.)....