- undeterred (adj.)
[undeterred 词源字典] - c. 1600, from un- (1) "not" + past participle of deter (v.).[undeterred etymology, undeterred origin, 英语词源]
- undeveloped (adj.)
- 1736, from un- (1) "not" + past participle of develop (v.). In reference to film, it is attested from 1939.
- undeviating (adj.)
- 1732, from un- (1) "not" + present participle of deviate.
- undeviating (adj.)
- 1732, from un- (1) "not" + present participle of deviate (v.).
- undies (n.)
- 1906, diminutive euphemistic abbreviation for women's underwear (or undergarments).
- undifferentiated (adj.)
- 1862, from un- (1) "not" + past participle of differentiate (v.).
- undigested (adj.)
- 1520s, from un- (1) "not" + past participle of digest (v.). Figurative sense is recorded from c. 1600.
- undignified (adj.)
- 1680s, of clergy, "not holding a position of dignity," from un- (1) "not" + dignified. Meaning "lacking in dignity of manner" is attested from 1782.
- undiluted (adj.)
- 1756, from un- (1) "not" + past participle of dilute (v.).
- undiminished (adj.)
- 1580s, from un- (1) "not" + past participle of diminish (v.).
- undine (n.)
- female water spirit, 1821, from Modern Latin Undina (1650s), coined by Paracelsus ("De Nymphis") in his alchemical system, from Latin unda "a wave, billow" (see water (n.1)). Popularized by German romance "Undine, eine Erzählung" (1811) by Baron F.H.C. La Motte Fouqué. Undinism (1928) was coined by sex researcher Havelock Ellis to describe the fetish for urine (which Ellis had); nowadays it would be called urophilia.
- undisciplined (adj.)
- late 14c., "untrained," from un- (1) "not" + past participle of discipline (v.). Similar formation in German undisciplinirt, Swedish odisciplinerad. Specific meaning "not subject to military discipline" is attested from 1718.
- undisclosed (adj.)
- 1560s, from un- (1) "not" + past participle of disclose (v.).
- undiscovered (adj.)
- 1540s, from un- (1) "not" + past participle of discover (v.).
- undisguised (adj.)
- c. 1500, in reference to things, from un- (1) "not" + past participle of disguise (v.). Of persons, attested from 1670s.
- undismayed (adj.)
- 1610s, from un- (1) "not" + past participle of dismay (v.).
- undisputable (adj.)
- 1590s, from un- (1) "not" + disputable (see dispute (v.)). The usual word is indisputable. Related: Undisputably.
- undisputed (adj.)
- 1560s, "not argued with," from un- (1) "not" + past participle of dispute (v.). Meaning "not called into question" is attested from 1620s.
- undistinguishable
- 1580s, from un- (1) ânotâ + distinguishable.
- undistinguished (adj.)
- 1590s, "not kept distinct," from un- (1) "not" + distinguished. Meaning "not elevated above others" is attested from c. 1600.
