usurper

This term carries a heavy weight of illegitimacy and betrayal. It is rarely used in casual conversation, appearing instead in historical accounts, political dramas, or legalistic discussions regarding the seizure of authority. The word evokes an image of a sudden, forceful displacement of a rightful leader, emphasizing the theft of a title rather than the mere act of governing.

While a dictator might be seen as a tyrant, a usurper is specifically defined by the act of taking something that belonged to another. The connotation is overwhelmingly negative, framing the individual as an intruder or a thief of power who lacks the moral or legal right to rule.