1. (a.) Sarcastic; harsh; severe; biting\.

2. (a.) Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.

3. (n.) A caustic curve or caustic surface.

Rabelaisian acerb acerbate acerbic acid acidic acidulent acidulous acrid acrimonious actual cautery acute amaroidal angry antagonistic antipathetic arc asperous astringent belligerent biting bitter bitter as gall bow brand brand iron branding iron brisk burning catacaustic catenary cauter cauterant cauterizer cautery choleric circle clashing coarse colliding conchoid conflicting corroding corrosive crisp critical crook curl curve cutting cynical despiteful destructive diacaustic discontented double-edged dry edged electrocautery ellipse embittered escharotic feeling evil festoon fierce full of hate hard harsh hateful hook hostile hot iron hyperbola incisive ironic irritating keen lituus lunar caustic malevolent malicious malignant mordacious mordant moxa nose-tickling out of humor out of sorts out of temper parabola penetrating piercing piquant pithy poignant potential cautery pungent quarrelsome radium rancorous rankled repugnant resentful resenting rigorous rough salty sarcastic sardonic satiric scathing scorching set against severe sharp sinus sore sour spiteful splenetic stabbing stewing stinging strident stringent succinct tart terse tracery trenchant vehement venomous violent virulent vitriolic withering