adjective
1.
Synonyms: incisive , biting, clear-cut, crisp, cutting, ingoing, penetrating
Related Word: piercing, probing, razor-sharp; sarcastic, sardonic, satiric; acrid; piquant, poignant, pungent
2.
Synonyms: caustic 1, mordacious, mordant, salty, scathing
Related Word: scalding, scorching