- undisturbed (adj.)
[undisturbed 词源字典] - c. 1600, from un- (1) "not" + past participle of disturb (v.).[undisturbed etymology, undisturbed origin, 英语词源]
- undivided (adj.)
- early 15c., from un- (1) "not" + past participle of divide (v.).
- undivulged (adj.)
- c. 1600, from un- (1) "not" + past participle of divulge (v.).
- undo (v.)
- Old English undon "to unfasten and open" (a window or door), "to unfasten by releasing from a fixed position; to cancel, discharge, abrogate, reverse what has been done, put back in a former condition; bring to ruin, destroy," from un- (2) "opposite of" + do (v.). Related: Undone; undoing.
- undocumented (adj.)
- 1883, from un- (1) "not" + past participle of document (v.).
- undomesticated (adj.)
- 1834, from un- (1) "not" + past participle of domesticate (v.). Undomestic "not caring for home life" is recorded from 1754.
- undone (adj.)
- "not accomplished," c. 1300, from un- (1) "not" + done. The same word meaning "destroyed" is recorded from mid-14c., past participle adjective from undo.
- undoubtable (adj.)
- early 15c., from un- (1) "not" + doubt (v.) + -able. Related: Undoubtably.
- undoubted (adj.)
- mid-15c., from un- (1) "not" + past participle of doubt (v.). Related: Undoubtedly.
- undreamed (adj.)
- 1610s, from un- (1) "not" + past participle of dream (v.).
- undress (v.)
- 1590s, "to shed one's clothing," from un- (2) "opposite of" + dress (v.). Transitive sense of "to strip off (someone's) clothing" is recorded from 1610s. Related: Undressed; undressing.
- undress (n.)
- "state of partial or incomplete dress," 1680s, from undress (v.). Meaning "ordinary dress" is from 1748.
- undressed (adj.)
- "naked (or nearly so)," 1610s, past participle adjective from undress (v.).
- undue (adj.)
- late 14c., "not owing or payable; unjustly demanded," also "not appropriate, unseasonable," also "excessive," from un- (1) "not" + past participle of due (v.). Formed on model of Old French indeu, Latin indebitus.
- undulant (adj.)
- 1830, from Latin undulantem (nominative undulans), from unda "wave" (see water (n.1)).
- undulate (v.)
- "to move in waves," 1660s, back-formation from undulation. Related: undulated, undulating.
- undulation (n.)
- 1640s, from Medieval Latin *undulatio, from Late Latin undulatus "wavy, undulated," from undula "wavelet," diminutive of Latin unda "wave" (see water (n.1)).
- unduly (adv.)
- late 14c., "without due moderation; improperly, unsuitably;" see undue + -ly (2). From early 15c. as "unjustly, wrongfully."
- undying (adj.)
- c. 1300, "immortal," from un- (1) "not" + present participle of die (v.). Figurative sense, of feelings, etc., is recorded from c. 1765.
- une (v.)
- "to unite," c. 1400, from Late Latin unire "to make into one" (transitive), from unus "one" (see one).
