What is the meaning of resentful?

• Resent: feel bitter or indignant about; "She resents being paid less than her co-workers"
• begrudge: wish ill or allow unwillingly

Resentment can be triggered by an emotionally disturbing experience that is being felt again or relived in the mind. When the person feeling resentment is directing the emotion at himself it appears as remorse.

Resentful: Inclined to resent; tending to feel anger from a belief that others have done wrong or engaged in mistreatment; indignant