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.
例句
...fathers who tyrannize their families...專橫對待家人的父親Armed groups use their power to tyrannise over civilians.武裝組織用武力欺壓平民。
英英詞典釋義
Verb
1. rule a country as a tyrant
2. rule or exercise power over (somebody) in a cruel and autocratic manner;