conceited (adj.)

c. 1600, "having an overweening opinion of oneself" (short for self-conceited, 1590s), past-participle adjective from conceit (v.) "conceive, imagine, think" (1550s), a now-obsolete verb from conceit (n.). Earlier it meant "having intelligence, ingenious, witty" (1540s). Related: Conceitedly; conceitedness.