undulant

Against the blue background of the sky, green hill-tops trace an undulant line.

She had the same undulant black hair, the same oval face and olive complexion, the same snapping eyes.

The air came brisk and sweet; it rippled the fields to undulant shimmer of flashing purple and green and gold.

"Now," he said, when he was stretched out on the undulant moss.

Beyond was a lake, very blue in the sunlight, bulwarked by undulant hills.