abseilyoudaoicibaDictYouDict[abseil 词源字典]
"Descend a rock face or other near-vertical surface by using a doubled rope coiled round the body and fixed at a higher point", 1930s: from German abseilen, from ab 'down' + Seil 'rope'. More This is from the German verb abseilen, from ab ‘down’ and seil ‘rope’.[abseil etymology, abseil origin, 英语词源]