'Rough' in the Bible

Every valley will be lifted up, and every mountain and hill will be lowered; the rough ground will become level, and the mountain ridges made a plain.

I'll help the blind walk, even on a road they do not know; I'll guide them in directions they do not know. I'll turn the dark places into light in front of them, and the rough places into level ground. These are the things I will do, and I won't abandon them.