remorse

Moral anguish arising from repentance for past misdeeds; bitter regret. synonym: penitence.

Compassion.

Intense and painful regret due to a consciousness of guilt; the pain of a guilty conscience; deep regret with self-condemnation.

Sympathetic sorrow; pity; compassion.

Synonyms Compunction, Regret, etc. (see repentance), self-reproach, self-condemnation, anguish, stings of conscience.