Autocrat (noun)

1. A ruler with complete power and authority.
2. A person who has absolute power and governs without the consent of the governed.

Origin:

From the greek words 'autos' meaning 'self' and 'kratos' meaning 'power' or 'rule'.

Examples:

1. The autocrat ruled the country with an iron fist.
2. The autocrat was widely criticized for human rights violations.
3. The autocrat was known for making unilateral decisions without consulting his advisors.
4. Many people were oppressed under the rule of the autocrat.
5. The autocrat was eventually overthrown in a popular uprising.