tarnish

(noun, verb)

noun

1. discoloration of metal surface caused by oxidation

Definition categories: attribute, discoloration, stain

verb

1. make dirty or spotty, as by exposure to air; also used metaphorically

- The silver was tarnished by the long exposure to the air

Similar word(s): defile, maculate, stain, sully

Definition categories: contact, blob, blot, fleck, spot

Sentences with tarnish as a verb:

- Careful storage of silver will prevent it from tarnishing.

- He is afraid that he will tarnish his reputation if he disagrees.