tyrannical

Of or relating to a tyrant or tyranny.

Characteristic of a tyrant or tyranny; despotic and oppressive: synonym: dictatorial.

Having the character of a tyrant; acting like a tyrant; despotic in rule or procedure; arbitrary; imperious; as, a tyrannical master.

Pertaining to or characteristic of a tyrant; unjustly severe in operation; oppressive.

Synonyms Domineering, severe, oppressive, galling, grinding. See despotism.