tarnish

• 名词，指金属表面因氧化或化学反应而变暗、失去光泽的现象，也指由此形成的暗淡表层。

A noun referring to the discoloration or dulling of a metal surface caused by oxidation or chemical reaction.

不可数

1. Metal discolorationB2formal

   A thin layer of discoloration or dullness that forms on the surface of metals like silver or copper due to oxidation or chemical reaction.

   失泽

   • The silverware had a layer of tarnish after years of storage.
   • She used a special cloth to remove the tarnish from the antique mirror.
   • The tarnish on the copper pot gave it an aged appearance.

   同义词discolorationdullnessfilmpatina

• 动词，指失去光泽或变得暗淡，常因空气或湿气所致；也用于比喻义，指损害声誉。

A verb used to indicate the process of losing luster or becoming dull, often due to exposure to air or moisture, or metaphorically to damage one's reputation.

1. To lose or cause to lose lusterB2formal

   To become dull, discolored, or stained, especially due to exposure to air or moisture.

   失去光泽

   • The silverware began to tarnish after being left out.
   • Exposure to salt air can tarnish metal quickly.
   • She polished the jewelry to remove the tarnish.

   同义词bluntdeadendimdiscolordullfadestain

   反义词brightenbuffpolishshine

2. To damage or spoilB2formal

   To harm the good reputation or quality of something.

   玷污

   • The scandal tarnished his public image.
   • Her honesty was never tarnished by the rumors.
   • The company's reputation was tarnished by the data breach.

   同义词besmirchblemishblightdisgracemarsmirchsoilstainsullytaint

   反义词enhanceglorifyhonorimprove