tarnish

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++tar·nish1 /ˈtɑːnɪʃ $ ˈtɑːr-/ verb  1  [transitive]HCMSPOIL if an event or fact tarnishes someone’s reputation, record, image etc, it makes it worse 玷污，败坏，损害〔名誉、形象等〕 His regime was tarnished by human rights abuses. 他的政权因践踏人权而形象受损。2  [intransitive, transitive]SHINE if metals such as silver, copper, or brass tarnish, or if something tarnishes them, they become dull and lose their colour （使）〔银、铜等金属〕失去光泽，变暗淡 Gold does not tarnish easily. 黄金色泽不容易变暗。 tarnished silver spoons 发乌的银勺→ See Verb table

Examples from the Corpus

tarnish• Profits at auto makers and other exporters could be tarnished by a weaker dollar against the yen.• I wanted it to shine the windows and polish the tarnished feelings like a good spring house-cleaning.• This reputation could be tarnished if adequate steps are not taken to control the rodent population.• The promise of town planning itself was tarnished in this context.• The brass is nice, but it will tarnish really easily.• Harassment of religion will only tarnish the orthodox church's reputation, while steeling the resistance of persecuted faiths.• The glass was so tarnished they could hardly be deciphered.• Neighbors' testimony tarnished Wilson's image as a loving mother.tarnish2 noun [singular, uncountable]  SHINEdullness of colour, or loss of brightness 颜色晦暗；暗淡无光Origin tarnish1 (1400-1500) Old French ternir “to make dull”

tar·nish1 verbtarnish2 nounChineseSyllable  

tarnishes fact record, or event someone’s Corpus an reputation, if

tarnish

I

tar‧nish¹ /ˈtɑːnɪʃ $ ˈtɑːr-/ verb1. [transitive] if an event or fact tarnishes someone’s reputation, record, image etc, it makes it worse:
    His regime was tarnished by human rights abuses.
2. [intransitive and transitive] if metals such as silver, copper, or brass tarnish, or if something tarnishes them, they become dull and lose their colour:
    Gold does not tarnish easily.
    tarnished silver spoons

II

tarnish² noun [singular, uncountable]
dullness of colour, or loss of brightness