S: (v) tarnish, stain, maculate, sully, defile (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"
S: (v) foul, befoul, defile, maculate (spot, stain, or pollute) "The townspeople defiled the river by emptying raw sewage into it"