expostulate (v.)

1530s, "to demand, to claim," from Latin expostulatus, past participle of expostulare "to demand urgently, remonstrate, find fault, dispute, complain of, demand the reason (for someone's conduct)," from ex "from" (see ex-) + postulare "to demand" (see postulate (v.)). Friendlier sense of "to reason earnestly (with someone) against a course of action, etc." is first recorded in English 1570s. Related: Expostulated; expostulating.