Vindictive is an Adjective
Meaning : Seeking revenge or being spiteful
It also means being unreasonably unfair towards someone who has hurt you
1. The landlord became vindictive when the tenant absconded without paying his rent.
2. Rima wanted to resign from her current job because of her vindictive boss.
3. Criminal charges against the young leader were vindictive attempts by the opposition to malign him