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English definition of “blacken”

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verb uk   /ˈblæk.ən/ us  

blacken verb (MAKE DARK)

[I or T] to become black or to make something become black: The folds of the curtains were blackened with dirt.

blacken verb (SPOIL)

blacken sb's name, image, reputation, etc. to spoil someone's reputation: The financial crash blackened the image of bankers.
(Definition of blacken from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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