'Thick' in the Bible

and ye draw near and stand under the mountain, and the mountain is burning with fire unto the heart of the heavens -- darkness, cloud, yea, thick darkness:

These words hath Jehovah spoken unto all your assembly, in the mount out of the midst of the fire, of the cloud, and of the thick darkness -- a great voice; and He hath not added, and He writeth them on two tables of stone, and giveth them unto me.

And Jeshurun waxeth fat, and doth kick: Thou hast been fat -- thou hast been thick, Thou hast been covered. And he leaveth God who made him, And dishonoureth the Rock of his salvation.