He felt regret for these people's young lives that would likely soon be lost.

On the death of a great man like him, we should feel only deep concern and regret.

If it is in my power, she will live only to feel regret.

Do not think that you are the only one to feel regret.

Nor is it possible for me not to feel regret.

All these memories will soon be gone, but still I do not feel regret.

So, on top of everything else, you'll be feeling regret.

For the first time, I actually felt regret about hiring her.

It was difficult to not feel regret when dealing with people who'd become friends.

Sometimes, over the course of my life, I've felt regret for killing someone.