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 ironic more ironic more ironical more painful more satirical more satirical more satiric more satiric most ironical most ironic most ironic most satiric most satiric most satirical most satirical nagging painful peppery poignant pungent sarcastic sardonic satirical/satiric satiric satirical scathing scoffing scorching severe sharp slashing smarting snarky sour stinging tart trenchant truculent vitriolic vitriolic