adjective
1.
marked by sharp and often witty incisiveness
a caustic critic
Synonyms: mordacious, mordant, salty, scathing, trenchant; compare sarcastic
Related Word: biting, cutting, incisive; acrid, bitter, pungent, tart; acute, keen, sharp; ironic, sarcastic, satiric, stinging; harsh, rough, severe, stringent; crisp, pithy, succinct, terse
Contrasted words: gentle, mild; cordial, gracious; bland, diplomatic, suave, urbane
Antonyms: genial
2.
Synonyms: sarcastic , acerb, acerbic, archilochian, corrosive, ||sarky