Tyrannous (adjective)

1. Having the characteristics of a tyrant; oppressive; unjustly severe; harsh; arbitrary; as, a tyrannous rule.
2. Resembling tyranny; tyrannical; as, tyrannous power.

Origin:

Derived from the latin word 'tyrannus' meaning 'despotic ruler, absolute monarch', which was originally used to describe the roman emperor augustus, who established the roman empire. the word was later applied to any unjust ruler or government.

Examples:

1. The tyrannous king made it illegal to speak out against him.
2. The tyrannous government controlled all the media outlets.
3. The people lived in fear of the tyrannous police force.
4. The tyrannous boss frequently berated his employees.
5. The tyrannous teacher demanded strict obedience from her students.