- untoward (adj.)
[untoward 词源字典] - 1520s, "not having inclination" (to or for something), also "difficult to manage, unruly," from un- (1) "not" + toward (adj.).[untoward etymology, untoward origin, 英语词源]
- untrained (adj.)
- 1540s, from un- (1) "not" + past participle of train (v.).
- untrammeled (adj.)
- also untrammelled, 1795, from un- (1) "not" + past participle of trammel (v.).
- untreatable (adj.)
- late 14c., "unmanageable," from un- (1) "not" + treatable (see treat (v.)). In medicine, of diseases, conditions, etc., by 1865.
- untried (adj.)
- 1510s, "not proven or tested," from un- (1) "not" + tried.
- untrodden (adj.)
- c. 1300, from un- (1) "not" + past participle of tread (v.).
- untroubled (adj.)
- late 15c., from un- (1) "not" + past participle of trouble (v.).
- 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 attested from c. 1300.
- untrustworthy (adj.)
- 1846, from un- (1) "not" + trustworthy. Related: Untrustworthiness.
- untruth (n.)
- Old English untreowþ "unfaithfulness, treachery," from un- (1) "not" + truth (n.). Similar formation in Old Norse utrygð. Meaning "falsehood" is attested from mid-15c., as is that of "a lie." Related: Untruthful.
- unturned (adj.)
- 1540s, from un- (1) "not" + past participle of turn (v.).
- untwist (v.)
- 1530s, from un- (2) "reverse, opposite of" + twist (v.). Related: Untwisted; untwisting.
- unusable (adj.)
- 1825, from un- (1) "not" + usable (adj.).
- unused (adj.)
- c. 1300, "unaccustomed," from un- (1) "not" + past participle of use (v.). Meaning "not employed" is recorded from late 14c.
- unusual (adj.)
- 1580s, from un- (1) "not" + usual (adj.). Related: Unusually.
- unutterable (adj.)
- 1580s, from un- (1) "not" + utterable (see utter (v.)). As a noun, from 1788; unutterables as a euphemism for "trousers" is recorded by 1843.
- unvanquished (adj.)
- late 14c., from un- (1) "not" + past participle of vanquish (v.).
- unvarnished (adj.)
- c. 1600, of statements, "not embellished," from un- (1) "not" + past participle of varnish (v.). Literal sense of "not covered in varnish" is recorded from 1758.
- unvarying (adj.)
- 1680s, from un- (1) "not" + present participle of vary (v.).
- unveil (v.)
- 1590s, in reference to sight, "to make clear," from un- (2) "opposite of" + veil (v.). Sense of "to display or reveal" (something) is from 1650s. Related: Unveiled; unveiling.
