impure

Etymology

From Middle French impur, from Latin impūrus.

adj

1. Not pure
   1. Containing undesired intermixtures
      The impure gemstone was not good enough to be made into a necklace, so it was thrown out.
   2. Unhallowed; defiled by something unholy, either physically by an objectionable substance, or morally by guilt or sin
   3. Unchaste; obscene (not according to or not abiding by some system of sexual morality)
      He was thinking impure thoughts involving a girl from school.
      “No one would marry her if she was impure, don't you see?” “Impure? Surely if a woman is forcibly deprived of her virginity, she can't be thought of as impure.” 2012, Frederick Ramsay, The Eighth Veil: A Jerusalem Mystery

verb

1. (transitive, obsolete) to defile; to pollute