To act the tyrant; to exercise arbitrary power; to rule with unjust and oppressive severity; to exercise power others not permitted by law or required by justice, or with a severity not necessary to the ends of justice and government; as, a prince will often tyrannize over his subjects; masters sometimes tyrannize over their servants or apprentices
tyr·an·nize tyrannizes tyrannizing tyrannized in BRIT, also use tyrannise If you say that one person tyrannizes another, you mean that the first person uses their power over the second person in order to treat them very cruelly and unfairly. fathers who tyrannize their families Armed groups use their power to tyrannise over civilians. to use power over someone cruelly or unfairly