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There are two senses of caustic.

Sense 1:

acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic

unpleasant (vs. pleasant)

Sense 2:

caustic, corrosive, erosive, vitriolic, mordant

destructive (vs. constructive)

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15y ago

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