to debase or make impure by adding inferior materials or elements; use cheaper, inferior, or less desirable goods in the production of (any professedly genuine article)

to adulterate food.

adulterated.

adulterous ( def. 1 ) .

verb

clarify , clean , cleanse , distill , filter , free , purify , refine

verb

alloy , amalgamate , attenuate , blend , cheapen , commingle , contaminate , cook , corrupt , cut * , defile , degrade , denature , depreciate , deteriorate , devalue , dilute , dissolve , doctor * , doctor up , falsify , impair , infiltrate , intermix , irrigate , lace * , make impure , mingle , mix , phony up , plant * , pollute , shave * , spike * , taint , thin , transfuse , vitiate , water down , weaken , debase , doctor , load , sophisticate , alter , counterfeit , spike , spurious , water