transitive verb disheveled -·eled or dishevelled -·elled, disheveling -·el·ing or dishevelling -·el·ling

1. to cause (hair, clothing, etc.) to become disarranged and untidy, as by pulling or loosening, etc.; tousle or rumple
2. to cause the hair or clothes of (a person) to become thus disarranged

Etymology: back-form. < disheveled