What does "compunction" mean?

Compunction: A picking of heart; poignant grief proceeding from a sense of guilt or consciousness of causing pain; the sting of conscience. He acknowledged his disloyalty to the king, with expressions of great compunction. Clarendon. Remorse is anguish of soul under a sense of guilt or consciousness of having offened God or brought evil upon one's self or others. Compunction is the pain occasioned by a wounded and awakened conscience. Neither of them implies true contrition, which denotes self-condemnation, humiliation, and repentance. We speak of the gnawings of remorse; of compunction for a specific act of transgression; of deep contrition in view of our past lives. See Regret.