verb (v)

• overtake with darkness or night(verb.emotion)

  source: wordnet30
• envelop with social, intellectual, or moral darkness(verb.contact)

  Example:
  The benighted peoples of this area.
  

  source: wordnet30
• make darker and difficult to perceive by sight(verb.change)

  Synonym:
  bedim
  

  source: wordnet30
• To involve in darkness; to shroud with the shades of night; to obscure.(verb)

  source: webster1913