helter-skelter (adv.)youdaoicibaDictYouDict[helter-skelter 词源字典]
also helter skelter, 1590s, perhaps from skelte "to hasten, scatter hurriedly," with the first element there merely for the sake of rhyme. As an adjective from 1785.[helter-skelter etymology, helter-skelter origin, 英语词源]