pollute
/pə-ˈlüt/
verb
to make ceremonially or morally impure : defile
debase
using language to deceive or mislead pollutes language
contaminate taint pollute defile mean to make impure or unclean. contaminate implies intrusion of or contact with dirt or foulness from an outside source. taint stresses the loss of purity or cleanliness that follows contamination.