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darken verb

  /ˈdɑɹkən/ , /ˈdɑːkən/
  • (transitive) To make dark or darker by reducing light.
  • (intransitive) To become dark or darker (having less light).
  • (transitive) To make dark or darker in colour.
  • (intransitive) To become dark or darker in colour.
 imbrunire

darkening

ottenebramento
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