Synonyms of caustic in English:
2 a caustic comment
sarcastic, cutting, biting, mordant, stinging, sharp, bitter, scathing, derisive, sardonic, ironic, scornful, trenchant, acerbic, vitriolic, tart, acid, pungent, acrimonious, astringent, rapier-like, razor-edged, critical, polemic, virulent, venomous, waspish
British informal sarky
rare mordacious, acidulous
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caustic, sarcastic, sardonic, ironic
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