adulterate

From Latin adulterātus (“adulterate, adulterated, defiled, polluted, counterfeited”), perfect passive participle of adulterō (“to adulterate, defile, commit adultery (with), counterfeit”) (see -ate (adjective-forming suffix)), from ad- (“to, in the direction of”) + alter (“other”) + -ō (verb-forming suffix), literally “to go after someone else”. Equivalent to adultery + -ate.

From Latin adulterātus, see Etymology 1 and -ate (verb-forming suffix).