sophisticate (v.)

early 15c., "use of sophistry; fallacious argument intended to mislead; adulteration; an adulterated or adulterating substance," from Medieval Latin sophisticationem (nominative sophisticatio), noun of action from past-participle stem of sophisticare "adulterate, cheat quibble," from Latin sophisticus "of sophists," from Greek sophistikos "of or pertaining to a sophist," from sophistes "a wise man, master, teacher" (see sophist). Greek sophistes came to mean "one who gives intellectual instruction for pay," and at Athens, contrasted with "philosopher," it became a term of contempt. 

Meaning "worldly wisdom, refinement, discrimination" is attested from 1850.

c. 1600, "mixed with a foreign substance, impure; no longer simple or natural," past-participle adjective from sophisticate (v.). Of persons, with a positive sense, "worldly-wise, discriminating, cultured," from 1895.