ty·rant 
/ˈtaɪrənt/ noun
plural ty·rants /ˈtaɪrənt/ noun [count] 1 : a ruler who has complete power over a country and who is cruel and unfair
▪ The country was ruled by a corrupt tyrant [=despot] for decades. 2 : someone who uses power in a cruel and unfair way
▪ Our boss is a real tyrant.
▪ The country was ruled by a corrupt tyrant [=despot] for decades.
▪ Our boss is a real tyrant.
