Learn English at
Anaversity

I help students all over the world think in English, speak with confidence, and stop translating in their heads.

Years of teaching and studying languages, distilled into one Anaversity.

tarnished (C1)

verb

Pronunciation: /ˈtɑːrnɪʃ/

To lose luster, especially as a result of exposure to air or moisture; to become dull or discolored.

The constant exposure to salty sea air caused the brass doorknob to tarnish.
If you don't polish the silverware regularly, it will tarnish.
The antique locket had tarnished over the years, but its sentimental value remained.