darkness

noun
dark*ness \ ˈdärk-nəs \
before 12th century
  • the quality or state of being dark: such as
  • the total or near total absence of light
  • the quality of being dark in shade or color : dark color or colors

plunge into darkness

idiom
plunge into darkness \
  • to cause (a place) to suddenly become dark

under (the) cover of darkness/night

idiom
under (the) cover of darkness/night \
  • in the dark : at night
Powered by Merriam-Webster