term:

Adulterate

adulterate vt

-at·ed
-at·ing
: to corrupt, debase, or make impure by the addition of a foreign or inferior substance or element
;esp
: to prepare for sale by omitting a valuable ingredient or by replacing more valuable ingredients with less valuable or inert and usually harmful ingredients or with ingredients different from those claimed NOTE: Under the federal Food, Drug, and Cosmetic Act, a device such as a piece of medical equipment that is defective in some way is considered adulterated.
adul·ter·a·tion [ə-dəl-tə-rā-shən]
n

adul·ter·a·tor [ə-dəl-tə-rā-tər]
n