Brown Driver Briggs

1. to be or become dark, grow dim, be darkened, be black, be hidden
1) (Qal)
1a1. to be or grow dark
1a2. to have a dark colour
1a3. to grow dim
2) (Hiphil)
1b1. to make dark, cause to be dark
1b2. to hide, conceal
1b3. to obscure, confuse (fig.)