Online Etymology Dictionary

superpose (v.): 1823, from French superposer, from super- (see super-) + poser (see pose (v.1)). Related: Superposed; superposing.
tappet (n.): machine part, 1745, apparently from tap (v.1) + -et, "but the use of the suffix is abnormal" [OED].
tarry (adj.): 1550s, from tar (n.1) + -y (2). Tarry-fingered "dishonest, thieving" is from 1825.
unkindly (adv.): c. 1200, "unsuitably, improperly," from un- (1) "not" + kindly (adv.). From mid-15c. as "discourteously, maliciously."
unlike (adv.): c. 1300, "unevenly," from un- (1) "not" + like (adv.) (see like (adj.)). From 1590s as "in a manner differing."
unlikely (adv.): mid-15c., "improbably," from un- (1) "not" + likely (adv.) (see likely (adj.)).
unmeaning (adj.): "having no signification," 1709, from un- (1) "not" + present participle of mean (v.).
unowned (adj.): 1610s, "unpossessed," from un- (1) "not" + past participle of own (v.). From 1715 as "unacknowledged."
unpardonable (adj.): 1520s, from un- (1) "not" + pardonable (adj.). Related: Unpardonably. Impardonable also is from 1520s.
unreason (n.): c. 1300, "injustice;" 1827, "absense of reason," from un- (1) "not" + reason (n.).
unredeemed (adj.): 1540s, "unsaved;" 1805, "not balanced by any good quality," from un- (1) "not" + past participle of redeem (v.).
unproved (adj.): "not demonstrated to be true," 1530s, from un- (1) "not" + past participle of prove (v.).
unseeded (adj.): 1775, "not sown," from un- (1) "not" + past participle of seed (v.). From 1932 in the sports sense.
unstuck (adj.): 1840, "unpierced;" 1860, "unglued," from un- (1) "not" + past participle of stick (v.).
untaught (adj.): mid-14c., "not instructed or educated," from un- (1) "not" + taught. Hence "spontaneous, natural" (mid-15c.).
unapprehended (adj.): 1590s, "not understood;" 1610s, "not taken or arrested," from un- (1) "not" + past participle of apprehend (v.).
unbosom (v.): "disclose in confidence" (secret opinions or feelings), 1580s, from un- (1) + bosom.
unbowed (adj.): late 14c., "not bent," also figuratively "not subdued," from un- (1) "not" + past participle of bow (v.).
uncharitable (adj.): mid-15c., from un- (1) "not" + charitable (v.). Related: Uncharitably (late 14c.).
uncolored (adj.): also uncoloured, 1530s, from un- (1) "not" + past participle of color (v.). As a verb, from uncolor is recorded from early 15c.
uncomely (adj.): c. 1200, "improper, unseemly, indecent," from un- (1) "not" + comely. Related: Uncomeliness.
uncleared (adj.): 1630s in reference to debts, 1772 in reference to land; from un- (1) "not" + past participle of clear (v.).
uncurious (adj.): 1560s, "not inquisitive," from un- (1) "not" + curious (adj.). From 1680s as "not odd or strange."
undeceived (adj.): c. 1400, "reliable, accurate, certain," from un- (1) "not" + past participle of deceive (v.).
flagman (n.): also flag-man, "signaler," 1832, from flag (n.1) + man (n.). Earlier it meant "admiral" (1660s).
urceolate (adj.): 1760, with -ate (1) + Latin urceolus, diminutive of urceus "pitcher," of uncertain origin (see urn).
geneva (n.): 1706, alteration (by influence of the Swiss city name) of Dutch genevre, French genière (see gin (n.1)).
wobbly (adj.): 1849, wabbly; see wobble (v.) + -ly (1). Form with -o- is from 1851. Related: Wobbliness.
xenial (adj.): "pertaining to hospitality," 1834, from Greek xenia (see Xenia) + -al (1). Related: Xenially.
face-card (n.): "court card," 1826, from face (n.) + card (n.1). So called for the portaits on them.
fagoting (n.): in embroidery, 1885, from faggot (n.1) "bundle." So called from the threads tied together in the middle.
entrain (v.2): "get on board a locomotive train," 1860s, from en- (1) "in, into" + train (n.). Related: Entrained.
erythro-: before vowels erythr-, word-forming element meaning "red," from comb. form of Greek erythros "red" (see red (1)).
water-moccasin (n.): type of snake in the U.S. South, 1821, from water (n.1) + moccasin (q.v.).
infecund (adj.): early 15c., from Latin infecundus, from in- "not, opposite of" (see in- (1)) + fecundus (see fecund). Related: Infecundity.
insensuous (adj.): "not affecting the senses," 1851, from in- (1) "not, opposite of" + sensuous. Related: Insensuously; insensuousness.
inspectorate (n.): 1762, "function or office of an inspector," from inspector + -ate (1). From 1853 as "district under the supervision of an inspector."
insusceptible (adj.): c. 1600; see in- (1) "not, opposite of" + susceptible (adj.). Perhaps modeled on French insusceptible (16c.).
intertribal (adj.): also inter-tribal, 1850; see inter- "between" + tribe (n.) + -al (1).
intransmutable (adj.): 1690s, from in- (1) "not, opposite of" + transmute (v.) + -able). Related: Intransmutably; intransmutability.
invitational (adj.): 1894, from invitation + -al (1). The noun is by 1940, short for invitational tournament.
irreclaimable (adj.): 1660s, from assimilated form of in- (1) "not, opposite of" + reclaimable (see reclaim (v.)). Related: Irreclaimably; irreclaimability.
Jew-baiting (n.): 1853, in reference to German Judenhetze; see Jew (n.) + bait (v.1). Related: Jew-baiter.
undefinable (adj.): "indefinable," 1650s, from un- (1) "not" + definable (see define). Related: Undefinably; undefinability.
impotable (adj.): "undrinkable," c.1600, from assimilated form of in- (1) "not" + potable, or else from Late Latin impotabilis.
impersuadable (adj.): 1763, from assimilated form of in- (1) "not, opposite of" + persuadable. [Earliest date in OED 2nd ed. print is a typo.]
impressible (adj.): "capable of receiving impression," 1620s, from impress (v.1) + -able. Related: Impressibly; impressibility.
impromptitude (n.): 1848, probably from French impromptitude, from assimilated form of in- "not, opposite of" (see in- (1)) + promptitude (see prompt (adj.)).
inconsumable (adj.): 1640s in reference to fire; 1785 in political economy; from in- (1) "not" + consumable. Inconsumptible is from 1570s.
incontiguous (adj.): 1650s, from Late Latin incontiguus, from in- "not" (see in- (1)) + contiguus (see contiguous). Related: Incontiguously; incontiguousness.