ego

Failing the exam was a massive blow to his fragile ego.

(Chinese) 考试不及格对他脆弱的自尊心是一个沉重的打击。

In Freudian theory, the ego must balance the impulses of the id and the rules of the superego.

(Chinese) 在弗洛伊德的理论中，自我必须平衡本我的冲动和超我的规则。