SYN: Morsel, piece, fragment, part.
ANT: Mass, whole.
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KEY: Biting.
SYN: Pungent, censorious, piercing, gnawing, sarcastic, sardonic, trenchant.
ANT: Pleasant, genial, soothing, complacent, flattering.
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KEY: Bitter.
SYN: Harsh, sour, sharp, tart, acrimonious, sarcastic, severe, sad, afflictive, intense, stinging, pungent, acrid, cutting.
ANT: Sweet, mellow, pleasant, affable, kindly, genial, light, mitigated, trivial.