1. the quality of being bitter, harsh, or caustic in speech, manner, or tone
Usage: abstract noun; typically uncountable
2. sharpness or severity of taste or smell
Usage: less common; often used in technical or descriptive contexts

Examples

• The acrimoniousness of her remarks left everyone uncomfortable.
• His tone carried an unmistakable acrimoniousness that made the conversation difficult.
• The debate devolved into acrimoniousness when personal attacks began.
• She spoke with such acrimoniousness that her friends felt hurt and defensive.
• The acrimoniousness between the two former partners was evident in every exchange.
• Despite the acrimoniousness of their disagreement, they managed to reach a compromise.