'Thick' in the Bible

Moses stretched forth his hand toward the sky, and there was a thick darkness in all the land of Egypt three days.

Yahweh said to Moses, "Behold, I come to you in a thick cloud, that the people may hear when I speak with you, and may also believe you forever." Moses told the words of the people to Yahweh.

It happened on the third day, when it was morning, that there were thunders and lightnings, and a thick cloud on the mountain, and the sound of an exceedingly loud trumpet; and all the people who were in the camp trembled.

The people stayed at a distance, and Moses drew near to the thick darkness where God was.