1520s, from Latin abrogatus, past participle of abrogare "to annul, repeal (a law)," from ab- "away" (see ab-) + rogare "propose a law, request" (see rogation). Form abrogen, from Old French abroger, is recorded from early 15c. Related: Abrogated; abrogating.[abrogate etymology, abrogate origin, 英语词源]