I. ˈrəm-pəl noun
Date: circa 1520
: fold , wrinkle
II. verb
( rum·pled ; rum·pling -p(ə-)liŋ)
Etymology: Dutch rompelen; akin to Old High German rimpfan to wrinkle
Date: 1603
transitive verb
1. : wrinkle , crumple
2. : to make unkempt : tousle
intransitive verb
: to become rumpled