tyranny

Unjust or oppressive governmental power.

A government in which a single ruler is vested with absolute power.

The office, authority, or jurisdiction of an absolute ruler.

The oppressive or unjust use of power.

A tyrannical act.

An oppressive or harshly limiting condition.

The rule of a tyrant in the ancient sense; the personal government of one of the Greek tyrants; a state or government having an uncontrolled ruler bearing the title of tyrant.

The office or incumbency of a tyrant; a tyrant’s administration or tenure; the system of government by tyrants.

Hence A tyrannical government; a lawless autocracy or despotism.