adulterated

Etymology

The adjectival sense's relation to adultery is the common theme that corruption or pollution has occurred; more at adulterate § Etymology.

adj

1. Intentionally tainted with impurities (usually as motivated by cheapening the production of a food product or enhancing the psychotropic effects of a street drug).
   The problem of adulterated milk has periodically reemerged as a public health menace, from New York in the 1850s to China in 2008.
   Heroin is often adulterated with fentanyl.

verb

1. simple past and past participle of adulterate