n.自我；自负；自尊心

We can't transcend the limitations of the ego. 我们无法超越自我的局限性。

Mind consists of three parts: id, ego and superego. 人的思想意识由三部分构成:以德,自我和超我。

He has the biggest ego of anyone I've ever met. 他是我所见的最自负的人。

That failure was a blow to my ego. 那项失败是对我自尊心的一个打击。

Losing the match make quite a dent in his ego. 比赛失败对他的自尊心打击极大。