Strong H2821 חָשַׁךְ châshak · to darken

Exodus

1. Exodus 10:15
   For they covered the face of the whole earth, so that the land was darkened; and they did eat every herb of the land, and all the fruit of the trees which the hail had left: and there remained not any green thing in the trees, or in the herbs of the field, through all the land of Egypt.