discoloration of metal surface caused by oxidation
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"
mark with a stigma or stigmata; "They wanted to stigmatize the adulteress"
to accuse or condemn or openly or formally or brand as disgraceful; "He denounced the government action"; "She was stigmatized by society because she had a child out of wedlock"