'Thick' in the Bible

and look to the earth, and see distress, darkness, and the gloom of anguish. They will be driven into thick darkness.

Behold, the name of Yahweh comes from far away, burning with his anger, and in thick rising smoke. His lips are full of indignation, and his tongue is as a devouring fire.

I have blotted out, as a thick cloud, your transgressions, and, as a cloud, your sins. Return to me, for I have redeemed you.