rancourousness

Example:The bitterness between the two parties made any form of compromise nearly impossible.

Definition:A bitter taste, especially one that produces an unpleasant or painful sensation; sharp resentment or ill-will; a feeling of petty, often prolonged hatred or a craving for revenge.

Example:Her resentment towards the judge's decision prevented her from accepting the settlement easily.

Definition:A feeling of annoyance and displeasure aroused by a wrong or a perceived injury; indignation or anger felt against someone for a specific act or a series of acts; a feeling of ill will or dislike that persists because of a grievance or an injustice done in the past.