From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
rumpling /ɹˈʌmplɪŋ/
zerknitternd, zerknautschend, zerknüllend, zusammenknüllend, zerwuzelnd
Synonyms: crushing, scrunching, crumpling, crumpling up, scrumpling up, creasing, crinkling
see: crush sth., scrunch sth., crumple sth., crumple up sth., scrumple up sth., rumple sth., crease sth., crinkle sth., crushed, scrunched, crumpled, crumpled up, scrumpled up, rumpled, creased, crinkled
From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
rumpling /ɹˈʌmplɪŋ/
zerwühlend, zerzausend, in Unordnung bringend
see: rumple sth., rumpled