acrimonious
ak-ruh-MOH-nee-usadjMeaning angry and bitter in tone
Memory hook ACRI = ACID: a sour, bitter fight. The two lemonade sellers argue over the best corner until their words turn as sour as acid. Their quarrel is acrimonious.
The acrimonious argument over the parking space lasted twenty minutes.
In context What began as a friendly debate about the town fountain turned acrimonious: neighbors shouted, slammed doors and stopped speaking to each other for weeks.
Similar bitter, hostile, angry, rancorous
Opposite friendly, cordial, harmonious
From acrimony, Latin acrimonia, “sharpness,” from acer, sharp, sour.