adulterate

1 containing foreign or lower-grade substances the pharmacist was convicted of selling adulterate drugs in order to maximize profits Synonyms impure, adulterated, alloyed, contaminated, dilute, diluted, polluted, tainted, thinned, weakenedRelated Words unclarified, unfiltered, unrefined; befouled, begrimed, bemired, besmirched, corrupted, debased, defiled, dirtied, fouled, maculate (or maculated), soiled, spoiled, sullied; blended, commingled, incorporated, intermingled, intermixed, merged, mingled, mixed; coalesced, combined, compounded; cheapened, doctoredNear Antonyms clarified, filtered, purified, refined, ultrarefined; neat, plain, straight; concentrated, strong; uncombined; pasteurized; sterile, sterilized; clean, immaculate, spotless, stainless, unsoiled, unsulliedAntonyms fine, pure, ultrapure, unadulterated, unalloyed, uncontaminated, uncut, undiluted, unmixed, unpolluted, untainted

2 relating to or being a sexual encounter or relationship between a married person and someone other than their spouse caught red-handed in what he claimed was his first adulterate encounter Synonyms adulterous, adulterine, extracurricular, extramarital, two-timingRelated Words premarital; promiscuous