NET
4 Every valley must be elevated, and every mountain and hill leveled. The rough terrain will become a level plain, the rugged landscape a wide valley.
Darby
4 Every valley shall be raised up, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough places a plain.
KJV
4 Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight, and the rough places plain: