Strong H2821 חָשַׁךְ châshak · to darken

Isaiah

1. Isaiah 5:30
   And in that day they shall roar against them like the roaring of the sea: and if one look unto the land, behold darkness and sorrow, and the light is darkened in the heavens thereof.
2. Isaiah 13:10
   For the stars of heaven and the constellations thereof shall not give their light: the sun shall be darkened in his going forth, and the moon shall not cause her light to shine.