1、后悔[词典]regret; remorse; repent;

2、[例句]（当时）拒绝您的盛情邀请，深感后悔。Much to my regret, I refused to accept your kind invitation.

3、埃利斯好像后悔问了这个问题。Ellis seemed to be regretting that he had asked the question

4、我并不后悔放弃了婚姻所带来的安全感。I don't regret stepping out of the security of marriage.