In a rough and uneven way, especially when talking about land or terrain.
Ruggedly can make people think of adventure, nature, and toughness.
Examples:
The path goes ruggedly up the mountain.
She walks ruggedly through the forest.
The ground goes ruggedly up and down.
He eats his sandwich ruggedly, like a bear.
The old house stands ruggedly on the hill.
The dog runs ruggedly through the field.