Definition: a narrow pass (especially one between mountains)
Main entry: foul, maculate, defile, befoul
Definition: spot, stain, or pollute
Usage: The townspeople defiled the river by emptying raw sewage into it
Main entry: maculate, tarnish, sully, defile, stain
Definition: make dirty or spotty, as by exposure to air; also used metaphorically
Usage: The silver was tarnished by the long exposure to the air; Her reputation was sullied after the affair with a married man
Main entry: corrupt, defile, sully, taint, cloud
Definition: place under suspicion or cast doubt upon
Usage: sully someone's reputation