'Thickets' in the Bible

When the men of Israel saw that they were in a strait (for the people were distressed), then the people did hide themselves in caves, and in thickets, and in rocks, and in coverts, and in pits.

For wickedness burns like a fire. It devours the briers and thorns; yes, it kindles in the thickets of the forest, and they roll upward in a column of smoke.

He will cut down the thickets of the forest with iron, and Lebanon will fall by the Mighty One.

Every city flees for the noise of the horsemen and archers; they go into the thickets, and climb up on the rocks: every city is forsaken, and not a man dwells therein.