Tarnish - Definition
tarnish
n 1: discoloration of metal surface caused by oxidation
v 1: 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" [syn: tarnish, stain,
maculate, sully, defile]