Defile

v. t.
  1. To make foul or impure; to make filthy; to dirty; to befoul; to pollute.
  2. To soil or sully; to tarnish, as reputation; to taint.
  3. To injure in purity of character; to corrupt.
  4. To corrupt the chastity of; to debauch; to violate; to rape.
  5. To make ceremonially unclean; to pollute.