tarnish
1. [ verb ] make dirty or spotty, as by exposure to air, of metals; also used metaphorically
Synonyms: sully defile stain maculate
Examples:

: "The silver was tarnished by the long exposure to the air" "Her reputation was sullied after the affair with a married man"

Related terms: spot darken macule blot
2. [ noun ] discoloration of metal surface caused by oxidation
Related terms: stain
Similar spelling:   tarnished
  tarrying
  Tarrance
  tarriance