- unborn (adj.)
[unborn 词源字典] - Old English unboren "not yet born; stillborn," from un- (1) "not" + born. Similar formation in Old Frisian unbern, Dutch ongeboren, Old High German ungiporan, German ungeboren.[unborn etymology, unborn origin, 英语词源]
- unbosom (v.)
- "disclose in confidence" (secret opinions or feelings), 1580s, from un- (1) + bosom.
- unbounded (adj.)
- 1590s, "not limited in extent," from un- (1) "not" + past participle of bound (v.1). Sense of "generous, profuse, liberal" is recorded from 1704. Related: Unboundedness.
- unbowed (adj.)
- late 14c., "not bent," also figuratively "not subdued," from un- (1) "not" + past participle of bow (v.).
- unbreakable (adj.)
- late 15c.; see un- (1) "not" + breakable.
- unbridled (adj.)
- late 14c., originally in figurative sense of "unrestrained, ungoverned," from un- (1) "not" + bridled (see bridle (v.)). Similar formation in Middle Dutch ongebreidelt. Literal sense of "not fitted with a bridle" (of horses) is not recorded before 1550s. The verb unbridle (see un- (2)) is attested from c. 1400 in the literal sense; mid-15c. in the figurative sense.
- unbroken (adj.)
- c. 1300, in reference to vows or compacts, from un- (1) "not" + broken. Attested from late 15c. in reference to material things; 1510s in reference to courage, spirit, etc.; 1530s in reference to horses; 1560s in reference to the flow of time. Old English had ungebrocen.
- unbuckle (v.)
- late 14c., from un- (2) "reverse of" + buckle (v.1). Related: Unbuckled; unbuckling.
- unburden (v.)
- 1530s, "to unload" (transitive), from un- (2) "reverse of" + burden (v.). Similar formation in German entbürden. Reflexive sense is recorded from 1580s. Related: Unburdened; unburdening.
- unburied (adj.)
- Old English unbyrged "unburied," from un- (1) "not" + past participle of bury (v.).
- unbutton (v.)
- early 14c., from un- (2) "opposite of" + button (v.). Related: Unbuttoned; unbuttoning.
- uncalled (adj.)
- c. 1400, "not summoned," from un- (1) "not" + past participle of call (v.). Similar formation in Swedish okallad, Danish ukaldet. With for and sense of "unnecessary, intrusive" it is first attested 1610.
- uncanny (adj.)
- 1590s, "mischievous;" 1773 in the sense of "associated with the supernatural," originally Scottish and northern English, from un- (1) "not" + canny.
- uncap (v.)
- 1560s, from un- (2) "reverse, opposite of" + cap (v.). Related: Uncapped; uncapping.
- uncaring (adj.)
- 1786, from un- (1) "not" + caring.
- unceasing (adj.)
- late 14c., from un- (1) "not" + present participle of cease (v.). Related: Unceasingly (mid-14c.).
- uncensored (adj.)
- 1890, from un- (1) "not" + past participle of censor (v.).
- unceremonious (adj.)
- 1580s, from un- (1) "not" + ceremonious. Related: Unceremoniously.
- uncertain (adj.)
- c. 1300, "of indeterminate time or occurrence," from un- (1) "not" + certain (adj.). Meaning "not fully confident" is recorded from late 14c. (implied in uncertainty). Related: Uncertainly.
- uncertainty (n.)
- late 14c., from uncertain + -ty.
