vindictive
US /vɪnˈdɪk.tɪv/
UK /vɪnˈdɪk.tɪv/

1.
vengativo, rencoroso
having or showing a strong or unreasoning desire for revenge
:
•
She was a vindictive woman who never forgave an insult.
Era una mujer vengativa que nunca perdonaba un insulto.
•
His actions were motivated by a vindictive desire to see them suffer.
Sus acciones estaban motivadas por un deseo vengativo de verlos sufrir.