tarnish

音标发音

The tarnish lay thick on the inside of the ring.
戒指内侧有一层厚厚的锈斑。
Moisture leads to the tarnish of the silverware.
湿气使得银器毫无光泽.
Wear cotton gloves when cleaning silver, because the acid in your skin can tarnish the metal.
清洁银器时要戴上棉手套，因为你皮肤里的酸性物质会使它失去光泽。
The tarnish lay thick on the inside of the ring.
戒指内侧有一层厚厚的锈斑。
Wear cotton gloves when cleaning silver, because the acid in your skin can tarnish the metal.
清洁银器时要戴上棉手套，因为你皮肤里的酸性物质会使它失去光泽。

(METAL) to make or (especially of metal) become less bright or a different colour
(GOOD OPINION) to make people think that someone or something is less good

If you say that something tarnishes someone's reputation or image, you mean that it causes people to have a worse opinion of them than they would otherwise have had.
tarnished
If a metal tarnishes or if something tarnishes it, it becomes stained and loses its brightness.