主しゅ我が主しゅ義ぎ者しゃ

noun

egoist

A person who adheres to egoism, a philosophical or ethical stance that prioritizes self-interest. This is a formal, academic term.

• 彼かれは主しゅ我が主しゅ義ぎ者しゃとして、自じ己この利り益えきを最さい優ゆう先せんする倫りん理り観かんを持もっている。

  As an egoist, he holds an ethical view that prioritizes his own interests above all.