impure

Concise Oxford English Dictionary © 2008 Oxford University Press:
impure/ɪmˈpjʊə(r)/

▶adjective

• 1 mixed with foreign matter; adulterated or tainted.

• 2 morally wrong, especially in sexual matters.

  ■ defiled or contaminated according to ritual prescriptions.

– derivatives
impurely adverb,
impureness noun.