Terrain that is broken and uneven is called rugged. If you want an easy hike, you should stay away from the rugged coastline. That rocky shoreline is definitely for the more experienced hikers.
The same sense of unevenness applies to other things that are described as rugged. If someone tells a man that he has a rugged face, it's meant to compliment his rough, strong looks. Rugged can also describe something that is steady, sturdy, and strong. Only your rugged constitution will keep you alive in that period of famine between your after school snack and dinner.