noun ダウンロード 🔗共有 利己主義, エゴイズム The quality of being selfish; the condition of putting one's own interests before those of others. Examples : "His selfishness prevented him from sharing his notes with the struggling classmate. " 彼の利己主義は、困っているクラスメートとノートを共有することを妨げた。 character attitude quality moral value philosophy mind human being emotion AIとチャット語彙ゲーム読解練習