- undelivered (adj.)
- late 15c., from un- (1) "not" + past participle of deliver (v.).
- unencumbered (adj.)
- 1722, from un- (1) "not" + past participle of encumber (v.).
- unexamined (adj.)
- late 15c., from un- (1) "not" + past participle of examine (v.).
- unexpected (adj.)
- 1580s, from un- (1) "not" + past participle of expect (v.). Related: Unexpectedly.
- unfamiliar (adj.)
- 1590s, from un- (1) "not" + familiar (adj.). Related: Unfamiliarly; unfamiliarity.
- unfinished (adj.)
- 1550s, from un- (1) "not" + past participle of finish (v.).
- unflattering (adj.)
- 1580s, from un- (1) "not" + gerundive of flatter. Related: Unflatteringly.
- unfulfilled (adj.)
- late 14c., from un- (1) "not" + past participle of fulfill (v.).
- unharmed (adj.)
- mid-14c., from un- (1) "not" + past participle of harm (v.).
- unbecoming (adj.)
- 1590s, from un- (1) "not" + becoming "fitting." Related: Unbecomingly.
- unavoidable (adj.)
- mid-15c., from un- (1) "not" + avoidable. Related: Unavoidably.
- unauthorized (adj.)
- 1590s, from un- (1) "not" + past participle of authorize (v.).
- unattractive (adj.)
- 1729, from un- (1) "not" + attractive. Related: Unattractively; unattractiveness.
- unassisted (adj.)
- 1610s, from un- (1) "not" + past participle of assist (v.). Related: Unassistedly.
- unanswered (adj.)
- late 14c., from un- (1) "not" + past participle of answer (v.).
- unaltered (adj.)
- 1550s, from un- (1) "not" + past participle of alter (v.).
- unambiguous (adj.)
- 1630s, from un- (1) "not" + ambiguous. Related: Unambiguously; unambiguousness.
- unaided (adj.)
- 1660s, from un- (1) "not" + past participle of aid (v.).
- unadorned (adj.)
- 1630s, from un- (1) "not" + past participle of adorn (v.).
- unacquainted (adj.)
- 1520s, from un- (1) "not" + past participle of acquaint (v.).
- unacceptable (adj.)
- late 15c., from un- (1) "not" + acceptable. Related: Unacceptably.
- unconstitutional (adj.)
- 1734, from un- (1) "not" + constitutional (adj.). Related: Unconstitutionally.
- uncontrolled (adj.)
- 1510s, from un- (1) "not" + past participle of control (v.).
- unconverted (adj.)
- 1640s, from un- (1) "not" + past participle of convert (v.).
- uncoordinated
- 1801, from un- (1) "not" + past participle of coordinate (v.).
- undifferentiated (adj.)
- 1862, from un- (1) "not" + past participle of differentiate (v.).
- undisclosed (adj.)
- 1560s, from un- (1) "not" + past participle of disclose (v.).
- undiscovered (adj.)
- 1540s, from un- (1) "not" + past participle of discover (v.).
- undismayed (adj.)
- 1610s, from un- (1) "not" + past participle of dismay (v.).
- undisturbed (adj.)
- c. 1600, from un- (1) "not" + past participle of disturb (v.).
- undivided (adj.)
- early 15c., from un- (1) "not" + past participle of divide (v.).
- undocumented (adj.)
- 1883, from un- (1) "not" + past participle of document (v.).
- uneducated (adj.)
- 1580s, from un- (1) "not" + past participle of educate (v.).
- undetermined (adj.)
- mid-15c., from un- (1) "not" + past participle of determine (v.).
- undetected (adj.)
- 1590s, from un- (1) "not" + past participle of detect (v.).
- unconcerned (adj.)
- 1630s, from un- (1) "not" + past participle of concern (v.). Related: Unconcernedly.
- uncompromising (adj.)
- 1799, from un- (1) "not" + present participle of compromise (v.). Related: Uncompromisingly.
- uncirculated (adj.)
- 1749, from un- (1) "not" + past participle of circulate (v.).
- uncharacteristic (adj.)
- 1753, from un- (1) "not" + characteristic (adj.). Related: Uncharacteristically.
- ashtray (n.)
- 1857 as a receptacle for smokers' ashes, from ash (n.1) + tray.
- analytical (adj.)
- 1520s, from Medieval Latin analyticus
(see analytic) + -al (1). Related: Analytically.
- abuzz (adv.)
- 1859, from a- (1) + buzz (n.). First recorded in Dickens.
- archetypal (adj.)
- 1640s, from Latin archetypum (see archetype) + -al (1). Jungian sense is from 1923.
- arms-length (n.)
- 1650s, from arm (n.1) + length. At arm's end is recorded from 1570s.
- aftershock (n.)
- also after-shock, 1894, from after + shock (n.1).
- alkaline (adj.)
- 1670s, "pertaining to alkalis," from alkali + -ine (1). Of soils, attested from 1850.
- alluvial (adj.)
- 1802, from Latin alluvius "alluvial" (see alluvium) + -al (1).
- shute (n.)
- 1790, "channel, trough," dialectal combination of chute and shoot (n.1).
- self-service (adj.)
- 1919, in reference to grocery stores, from self- + service (n.1).
- callosal (adj.)
- "pertaining to the corpus callosum," from Latin callosus (see callous) + -al (1).
