More rough or uneven, especially in a strong or tough way.
Ruggeder things can make people think of nature, mountains, or hard work.
Examples:
The ruggeder path is harder to walk on.
The ruggeder rock is more difficult to climb.
She prefers the ruggeder terrain for hiking.
I need a ruggeder jacket for the cold weather.
The ruggeder the mountain, the more fun it is to climb.
His hands are ruggeder from working outside.