caustic
[adjective]
Synonyms:
- burning, acrid, astringent, biting, corroding, corrosive, mordant, vitriolic
- sarcastic, acrimonious, cutting, pungent, scathing, stinging, trenchant, virulent, vitriolic

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Antonyms: genial
Contrasted words: gentle, mild, cordial, gracious, bland, diplomatic, suave, urbane
Related Words: biting, cutting, incisive, acrid, bitter, pungent, tart, acute, keen, sharp, ironic, sarcastic, satiric, stinging, harsh, rough, severe, stringent, crisp, pithy, succinct, terse

[TahlilGaran] English Synonym Dictionary ▲

caus‧tic /ˈkɔːstɪk $ ˈkɒːs-/ adjective
[Date: 1300-1400; Language: Latin; Origin: causticus, from Greek, from kaiein 'to burn']

1. a caustic substance can burn through things by chemical action:
caustic soda (=a chemical used for cleaning things)

2. a caustic remark criticizes someone in a way that is unkind but often cleverly humorous Synonym : acerbic
caustic wit/comments/remark etc
Eliot appreciated Pound’s caustic wit.
—caustically /-kli/ adverb:
‘I can hardly wait,’ Sir Trevor replied caustically.

[TahlilGaran] Dictionary of Contemporary English ▲