- unsupervised (adj.)
[unsupervised 词源字典] - 1845, from un- (1) "not" + past participle of supervise (v.).[unsupervised etymology, unsupervised origin, 英语词源]
- unsupported (adj.)
- early 15c., from un- (1) "not" + past participle of support (v.).
- unsure (adj.)
- c. 1400, "not safe against attack," also "lacking certainty," from un- (1) "not" + sure (adj.).
- unsurmountable (adj.)
- "incapable of being overcome," 1701, from un- (1) "not" + surmountable.
- unsurpassable (adj.)
- 1610s, from un- (1) "not" + surpassable (see surpass (v.)).
- unsurpassed (adj.)
- 1775, from un- (1) "not" + past participle of surpass (v.).
- unsuspected (adj.)
- 1520s, from un- (1) "not" + past participle of suspect (v.).
- unsuspecting (adj.)
- 1590s, from un- (1) "not" + present participle of suspect (v.).
- unsustainable (adj.)
- 1670s, from un- (1) "not" + sustainable (adj.).
- unswayed (adj.)
- 1590s, from un- (1) "not" + past participle of sway (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.
- unswerving (adj.)
- 1690s, from un- (1) "not" + present participle of swerve (v.).
- unsympathetic (adj.)
- 1785, from un- (1) "not" + sympathetic (adj.).
- unsystematic (adj.)
- 1770, from un- (1) "not" + systematic (adj.).
- 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.).
- 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.
- untangible (adj.)
- 1775, from un- (1) "not" + tangible (adj.).
- untangle (v.)
- 1540s, from un- (2) "reverse, opposite of" + tangle (v.). Related: Untangled; untangling.
- untapped (adj.)
- 1775, from un- (1) "not" + past participle of tap (v.). Figurative use from c. 1890.
- untaught (adj.)
- mid-14c., "not instructed or educated," from un- (1) "not" + taught. Hence "spontaneous, natural" (mid-15c.).
