Acrimonious

/ˌæk.rɪˈmoʊ.ni.əs/ adjective medium

Marked by sharp bitterness or ill will, especially in speech or disagreement.

The two business partners ended their acrimonious dispute only after a judge forced them to sell the company.

Memory Trick

'Acri-' echoes 'acrid,' a harsh, bitter smell — an acrimonious quarrel leaves the same bitter taste in everyone's mouth.