Vengeful (adjective)

1. Having or showing a strong or bitter desire to harm someone in return for something that they have done.
2. Desiring or intending to take revenge.
3. Having a desire for retaliation.
4. Having a strong desire to seek revenge.
5. Full of or motivated by a desire for revenge.

Origin:

Late middle english: from old french vengéful, from venger "avenge", from latin vindicare "claim, avenge".

Examples:

1. The vengeful man sought to take revenge on those who had wronged him.
2. The vengeful woman had a strong desire to hurt those who had hurt her.
3. The vengeful act was motivated by a desire for retaliation.
4. The vengeful employee was fired for seeking revenge against his boss.
5. The vengeful attitude was harmful to both the person who held it and those around them.