caustic

abrasive acerbic acid acrimonious acrid acrid alkaline biting bitter burning corrosive cutting destructive devastating dry incisive ironic/ironical ironic keen keenest mordacious mordant more ironical more ironic more ironic more painful more satirical more satirical more satiric more satiric most ironical most ironic most ironic most satirical most satirical most satiric most satiric nagging painful peppery poignant pungent sardonic sarcastic satirical satiric satirical/satiric scathing scoffing scorching severe sharp slashing smarting snarky sour stinging tart trenchant truculent vitriolic vitriolic