- 1critical in a bitter or sarcastic way synonym scathing caustic comments/wit Her speech was a caustic attack on government officials.
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- 2(of a chemical substance) able to destroy or dissolve other substances synonym corrosive a caustic cleaning product caustic liquid which blisters the skin
NAmE//ˈkɔstɪkli//
adverb “You are no help at all,” she said caustically.See caustic in the Oxford Advanced Learner's DictionaryCheck pronunciation: caustic