tyrant
//ˈtaɪ.rənt//
Noun
tyrantSingular
tyrantsPlural
1
A cruel and oppressive ruler who exercises absolute power unjustly or brutally.
The tyrant ruled the country with an iron fist, showing no mercy to his people.
2
A person who exercises power or authority in a harsh, domineering, or arbitrary manner.
My boss is a tyrant who never listens to anyone's opinions.