僭せん主しゅ

noun

usurper; tyrant

Historical term for a ruler who seizes power illegitimately, often used in classical Chinese and Japanese contexts. Not a common modern word; typically encountered in historical or political discussions.

• 古こ代だい中ちゅう国ごくの歴れき史し書しょには、しばしば僭せん主しゅの記き述じゅつが見みられる。

  Descriptions of usurpers are often found in ancient Chinese history books.

• 彼かれは自みずからを王おうと称しょうしたが、民みん衆しゅうからは僭せん主しゅと見みなされていた。

  He called himself king, but the people regarded him as a usurper.