impurity n. + Add to list US //ˌɪmˈpjʊɹəti// UK //ɪmpjˈʊɹɪti// im·pu·ri·ty SynonymsAntonymsEtymology Synonyms drossimpureness Antonyms purityOriginFRMimpurité→ENimpurity From impure + -ity. From Middle French impurité, from Latin impuritas.