ACRIMONIOUS
acrimonious, bitter
(adjective) marked by strong resentment or cynicism; “an acrimonious dispute”; “bitter about the divorce”
Source: WordNet® 3.1
Etymology
Adjective
acrimonious (comparative more acrimonious, superlative most acrimonious)
(archaic) Harsh and sharp, or bitter and not pleasant to the taste; acrid, pungent.
(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
Anagrams
• isocoumarin
Source: Wiktionary
Ac"ri*mo"ni*ous, a. Etym: [Cf. LL. acrimonious, F. acrimonieux.]
1. Acrid; corrosive; as, acrimonious gall. [Archaic] Harvey.
2. Caustic; bitter-tempered' sarcastic; as, acrimonious dispute,
language, temper.
Source: Webster’s Unabridged Dictionary 1913 Edition