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1. Making impure or corrupt by adding extraneous materials
   "the adulterant effect of extraneous materials";
   - adulterating

1. Any substance that lessens the purity or effectiveness of a substance
   "it is necessary to remove the adulterants before use";
   - adulterator

Derived forms: adulterants

See also: extraneous, foreign

Type of: substance

Antonym: purifying

Encyclopedia: Adulterant