tarnish
/ˈtɑɹnɪʃ/ noun C1- Oxidation or discoloration, especially of a decorative metal exposed to air.
Plural tarnishes
From the library
They have allowed all this time to elapse, and then all of a sudden rake up events which have been forgotten to furnish materials for scandal, in order to tarnish the lustre of our high position.
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