If something is runkled, it is not smooth and has a lot of little folds or bumps.
Runkled things might look old or messy.
Examples:
The paper was runkled and hard to read.
Her dress was runkled after she sat down.
The runkled blanket was warm and cozy.
The runkled map was hard to follow.
The runkled road went up and down like a roller coaster.
The runkled dog was very cute and friendly.