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English definition of “blacken”

blacken

verb [I or T] (MAKE DARK)    /ˈblæk.ən/
to become black or to make something become black: The folds of the curtains were blackened with dirt.Making things dirty and untidy
(Definition of blacken verb (MAKE DARK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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