Entry 2 senses Webster, 1913

Acrimonious

/ăkˌ-rəm-ōn'-ē-əs/ · Ac·ri·mo·ni·ous · IPA /ˌæk.ɹɪˈmoʊ.ni.əs/

01 a. Acrid; corrosive; as, acrimonious gall.

1.
Acrid; corrosive; as, acrimonious gall.[Archaic]
2.
Caustic; bitter-tempered' sarcastic; as, acrimonious dispute, language, temper.