Darken
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( a.) To make foul; to sully; to tarnish.
(2): ( a.) To cast a gloom upon.
(3): ( a.) To cloud, obscure, or perplex; to render less clear or intelligible.
(4): ( a.) To render dim; to deprive of vision.
(5): ( a.) To make dark or black; to deprive of light; to obscure; as, a darkened room.
(6): ( v. i.) To grow or darker.
King James Dictionary [2]
D'Arken, To grow dark or darker also, to grow less white or clear.