Third-person singular simple present indicative form of tarnish

Oxidation or discoloration, especially of a decorative metal exposed to air.

(intransitive) To oxidize or discolor due to oxidation. / (transitive) To compromise, damage, soil, or sully. / (intransitive, figuratively) To lose its lustre or attraction; to become dull.

present participle of tarnish

The act by which something is tarnished.

simple past tense and past participle of tarnish

Discolored or blemished. / (figuratively, by extension, of one's reputation, name or word) Sullied or dishonored.

Capable of becoming tarnished.

One who, or that which, tarnishes.

plural of tarnisher