Impure

1. To defile; to pollute.
2. Unchaste; lewd; unclean; obscene; as, impure language or ideas.
3. Not purified according to the ceremonial law of Moses; unclean.
4. Not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.
5. Defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.
6. Not accurate; not idiomatic; as, impure Latin; an impure style.