Английский Этимологический словарь - question (n.)

- 12c., from Anglo-Fr. questiun, O.Fr. question "legal inquest," from L. quжstionem (nom. quжstio) "a seeking, inquiry," from root of quжrere "ask, seek." The verb is first recorded 1470. Question mark is from 1869, earlier question stop (1862). Depriciatory sense of questionable is c.1800.