LATIN DICTIONARYLexicon Latīnum
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“acrimonious” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

acrimonious
acrid, Vid:
Figuratively, of words etc., amarus (bitter): acerbus (sour): asper (rough): mordax (biting): invidiosus (calculated to raise a prejudice against the person attacked): aculeatus (stinging). Acrimonious words, verborum aculei.

Quick answer

What is the Latin word for acrimonious?
The usual Latin words for “acrimonious” are amārus, acerbus, asper; also mordāx, invidiōsus, aculeātus. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.