| noun | any substance that lessens the purity or effectiveness of a substance “it is necessary to remove the adulterants before use” |
| adjective | making impure or corrupt by adding extraneous materials “the adulterating effect of extraneous materials” |
| adulterant | adjective | making impure or corrupt by adding extraneous materials |
| adulterate | verb | corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones |
| adulterant | noun | any substance that lessens the purity or effectiveness of a substance |