rucksack
/ˈrʌksæk/noun
- a bag with shoulder straps which allow it to be carried on someone's back, typically made of a strong, waterproof material and widely used by hikers（尤指用牢固的防水材料制成、徒步旅行者广泛使用的）帆布背包。
词源
mid 19th cent.: from German, from rucken （dialect variant of Rücken 'back'） + Sack 'bag, sack'.