1
- lose or cause to lose lustre, especially as a result of exposure to air or moisture（使）失去光泽：
no obj. silver tarnishes too easily银很容易失去光泽
with obj. lemon juice would tarnish the gilded metal.柠檬汁会使镀金金属失去光泽。
1.1
- figurative make or become less valuable or respected〈喻〉败坏; 玷污：
with obj. his regime had not been tarnished by human rights abuses.他的政权并没有因为践踏人权而名誉受损。
mass noun
1- dullness of colour; loss of brightness色泽暗淡; 失泽。
1.1
- a film or stain formed on an exposed surface of a mineral or metal（矿物, 金属上的）失泽膜。
1.2
- figurative damage or harm done to something〈喻〉瑕疵, 污点。
派生词
tarnishable
adjective词源
late Middle English (as a verb)： from French terniss-, lengthened stem of ternir， from terne 'dark， dull'.