adulterant
— Adjective
– English
~ making impure or corrupt by adding extraneous materials; "the adulterating effect of extraneous materials"
adulterant
— Noun
– English
~ any substance that lessens the purity or effectiveness of a substance; "it is necessary to remove the adulterants before use"
adulterate
— Verb
– English
~ corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones; "adulterate liquor"