- blacken (v.)
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[blacken 词源字典] - c. 1200, "become black or dark;" early 14c., "make black, darken, dye (hair);" see black + -en (1). Figurative sense of "to besmirch" (with dishonor, etc.) is from early 15c. Related: Blackened; blackening.[blacken etymology, blacken origin, 英语词源]