feelings of anger or bitterness
acrimony - bitterness
‘Acrimony’ refers to harsh or sharp feelings between people or groups who disagree strongly over something and do not like each other. It typically involves a lengthy dispute featuring frequent arguments and expressions of anger or resentment. This formal word is most commonly used in a professional context, such as in relation to a legal dispute or conflict in business.
Both sides came together to discuss a deal, but in the end, the meeting ended in acrimony.
International tensions have increased as a result of the increasingly acrimonious quarrel over territorial rights between the two countries.
I had worked with Brian for years, but our partnership ended acrimoniously after a dispute over money.