'Rugged' in the Bible

These [armies, like flies and bees] will all come and settle on the steep and rugged ravines and in the clefts of the rocks, and on all the thorn bushes and in all the watering places.

“Let every valley be lifted up,And every mountain and hill be made low;And let the rough ground become a plain,And the rugged terrain a broad valley;

“I will lead the blind by a way they do not know,In paths they do not know I will guide them.I will make darkness into light before themAnd rugged places into plains.These are the things I will do,And I will not leave them undone.”