discoloration of metal surface caused by oxidation
make dirty or spotty; 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"
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"
make dirty or spotty, as by exposure to air; also used metaphorically
