remorse

I could forgive him for what he did if he showed some remorse.如果他表现出一些悔意，我可以原谅他所干的事。

She was filled with remorse for not visiting her father more often. [=she was very sorry that she did not visit her father more often]她因没有更常去看望父亲而懊悔不已。

I felt a bit of remorse [=regret] for being so impatient.我为自己如此急躁而感到些许自责。