Rancor /(răṉ"kẽr)/
Ran·cor
Rancor
n.
-
The deepest malignity or spite; deep-seated enmity or malice; inveterate hatred.
It would not be easy to conceive the passion, rancor, and malice of their tongues and hearts.
Rancor will out; proud prelate, in thy face I see thy fury.
Rancor is that degree of malice which preys upon the possessor.