"one who lives at the same time as another," 1630s, originally cotemporary, from co- + temporary; modified by influence of contemporary (adj.). A native word for it was time-fellow (1570s), and earlier was contemporanie (early 15c.), from Latin contemporaneus, used as a noun. Also compare crony.

"overbearing," 1570s, present-participle adjective from control (v.). Related: Controllingly.

1650s, "uneasy, troubled, anxious," past-participle adjective from concern (v.). As an American English euphemism for "damned," 1834 (consarnt), also consarned. Related: Concernedly.

late 14c., "reconcile, bring into harmony" (transitive); c. 1400, "agree, cooperate," from Old French concorder and directly from Latin concordare "be of one mind," from concors "of the same mind" (see concord (n.)). Related: Concorded; concording.

"professional leader of a mercenary troop," 1794, from Italian condottiere, from condotto "to conduct," from Latin conducere "to lead or bring together" (see conduce).

late 14c., "means of preservation, a preservative," from conservative (adj.). The political use is by 1831, originally in a British context. 

"capable of receiving consolation," 1721; see console (v.) + -able. It seems to be mostly a dictionary word, perhaps a back-formation from inconsolable.

"pertaining to or in the manner of conspiracy," 1843; see conspirator + -ial. Related: Conspiratorially.

"distinguish by opposite qualities," 1630s; see contra- + distinguish. Related: Contradistinguished; contradistinguishing.

"on the contrary, on the other hand," mid-15c.; see contrary + wise (n.).