'Hollows' in the Bible

And if he sees that the walls of the house are marked with hollows of green and red, and if it seems to go deeper than the face of the wall;

And Midian was stronger than Israel; and because of the Midianites, the children of Israel made holes for themselves in the mountains, and hollows in the rocks, and strong places.

When the men of Israel saw the danger they were in, (for the people were troubled,) they took cover in cracks in the hillsides and in the woods and in rocks and holes and hollows.

They have to get a resting-place in the hollows of the valleys, in holes of the earth and rocks.

In Gilead there is evil. They are quite without value; in Gilgal they make offerings of oxen; truly their altars are like masses of stones in the hollows of a ploughed field.