暴君

tyrant, despot

暴 violence; violent + 君 -kun

noun Rare #39,931

tyrant, despot A ruler who exercises power cruelly or unjustly; also used figuratively for a cruel, domineering person.

JA: 彼は暴君のように部下を扱った。

EN: He treated his subordinates like a tyrant.

Emperor Nero was an extremely evil tyrant.

If we surrender to Cao Cao, we'll be aiding a tyrant.

— レッドクリフ Part I (2008)