tarnished
Definitions
Dull or discolored by exposure to air or moisture, typically referring to metal.
Having lost luster, reputation, or integrity; sullied or stained.
Examples
The silver trophy had become tarnished after years of sitting neglected on the shelf.
His reputation was permanently tarnished by the corruption scandal that rocked the company.
She polished the tarnished brass candlesticks until they gleamed like new.