Bedeutung von “tarnish” — Learner’s Dictionary

tarnish

verb us uk /ˈtɑːnɪʃ/
SOMEONE [ T ]

to spoil the way in which people think of someone so that they do not respect them:

to tarnish / someone's image/reputation
METAL [ I, T ]

If a metal tarnishes or something tarnishes it, it becomes less bright and shiny.

(Definition von “tarnish” aus dem Cambridge Learner's Dictionary © Cambridge University Press)