Acrimonious

1. (archaic) Harsh and sharp, or bitter and not pleasant to the taste; acrid, pungent.
2. (figuratively) Angry, acid, and sharp in delivering argumentative replies: bitter, mean-spirited, sharp in language or tone. [from early 17th c.]

Synonyms

• acerb, acerbic
• bitter
• rancorous

Antonyms

• nonacrimonious