忘恩负义

She was saddened by her son's ingratitude.

儿子负义伤了她心。

I can’t believe he didn’t even say thank you. How ungrateful can you get?

他甚至连谢谢都没说，真让人难以相信。一个人怎么可能这么负义呢？

When you say such nasty things about the organization, you’re biting the hand that feeds you.

你说组这些骯脏话，是负义。

He is not the first politician to kick down the ladder by which he has risen to exalted heights.

他不是第一个被抬上高位便负义政客。