Rancorous
['ræŋkərəs]
Definition
(adj.) showing deep-seated resentment; 'preserve...from rancourous envy of the rich'- Aldous Huxley .
Inputed by Gavin--From WordNet
Definition
(a.) Full of rancor; evincing, or caused by, rancor; deeply malignant; implacably spiteful or malicious; intensely virulent.
Inputed by Leonard
Synonyms and Synonymous
a. Malignant, malign, vindictive, malevolent, malicious.
Inputed by Gustav