1. Failure is never quite so frightening as regret.
2. From Cairo came expressions of regret at the attack.
3. Her lack of co-operation is nothing new, I regret to say.
4. We regret to inform you that you are being furloughed indefinitely.
5. They will bitterly regret what they have done for ever more.
6. I don't regret stepping out of the security of marriage.