What does 君主 mean?
君主 is a Japanese noun meaning “ruler, monarch” in English. It is written as 君主 in kanji, くんしゅ in hiragana, and kunshu in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
その君主は臣民に対して絶対の支配権を持っていた。
The lord held absolute power over his subjects.