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English definition of “sully”

sully

verb [T] uk   /ˈsʌl.i/ formal us  
to spoil something that is pure or someone's perfect reputation: His reputation, he said, had been unfairly sullied by half-truths and innuendos. to make something dirty: No speck of dirt had ever sullied his hands.
(Definition of sully from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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