dictator
noun [ C ] disapproving uk/dɪkˈteɪ.tər/ us/ˈdɪk.teɪ.t̬ɚ/
独裁者，暴君
a leader who has complete power in a country and has not been elected by the people
独断专行者；专权者
a person who gives orders and behaves as if they have complete power
My boss is kind of a dictator. 我的老板是个有点独断专行的人。