Verb
1. place under suspicion or cast doubt upon;
"sully someone's reputation"2. 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"3. spot, stain, or pollute;
"The townspeople defiled the river by emptying raw sewage into it"