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