compunction
n[U]
~ (about doing sth) (fml 文) (usu in negative sentences 通常用於否定句) feeling of guilt or regret for one´s action 内疚; 後悔; 懊悔
She kept us waiting without the slightest compunction. 她一直让我们等著却毫无歉意.
If I could find the people responsible, I would have no compunction about telling the police. 我要知道是谁干的就去报警而毫不後悔.