1. the quality of having a rough, uneven, or rocky surface
2. the quality of being strong, sturdy, and able to withstand harsh conditions
3. the quality of being harsh or difficult to endure

Examples

• The ruggedness of the mountain terrain made hiking extremely challenging.
• We admired the ruggedness of the coastline with its jagged cliffs.
• The phone’s ruggedness allows it to survive drops and water exposure.
• The ruggedness of frontier life required great physical and mental strength.
• His face showed the ruggedness of years spent working outdoors.
• The ruggedness of the winter weather tested everyone’s endurance.