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...专横对待家人的父亲Armed groups use their power to tyrannise over civilians.武装组织用武力欺压平民。
英英词典释义
Verb
1. rule a country as a tyrant
2. rule or exercise power over (somebody) in a cruel and autocratic manner;