What is the meaning of Rancor?

A feeling of long-lasting ire for another, sometimes to the point of hatred, over a perceived wrongdoing; bitterness.

Rancidity, rankness.

rancor (the deepest malignity or spite)

rancor; grudge

rancidity, stench, rankness

grudge, rancor

alternative form of rancour

ill-will; negative opinion or intention

rancor; grudge (deep seated animosity)

Source: wiktionary.org