rucksack
noun (British English)(also backpack North American English, British English)
a bag that you carry on your back, made of strong material and often used by people who go climbing or walking （尤指登山者或远足者使用的）背包，旅行包 
Extra ExamplesTopics Holidaysb2She slung her rucksack over her shoulder. 她把背包挎到肩上。 He had a large rucksack on. 他背着一个大背包。 He had very little in his rucksack. 他的背包里只有很少的东西。
Oxford Collocations Dictionaryverb + rucksack- pack
- open
- put on
- …
- in a/the rucksack
Word Originmid 19th cent.: from German, from rucken (dialect variant of Rücken ‘back’) + Sack ‘bag, sack’.
