knapsack

名词 knapsack:

1. a bag carried by a strap on your back or shoulder
   同义词：backpack, back pack, packsack, rucksack, haversack

1. After a short rest, they took up their knapsacks and went on.
   休息了一会儿之后，他们又背起背包上路了。

knap.sack

n.（名词）
A bag made of sturdy material and furnished with shoulder straps, designed for carrying articles such as camping supplies on the back.
背包：由结实的材料制成的有肩背带的背包，用于背如野营用品等物品

来源：
Probably Low German Knappsack
可能为 低地德语 Knappsack
knappen [to bite] [probably of imitative origin]
knappen [咬] [可能源于拟声词]
Sack [bag] from Middle Low German sak from Old High German sac from Late Latin saccus * see sack
Sack [包] 源自 中古低地德语 sak 源自 古高地德语 sac 源自 后期拉丁语 saccus *参见 sack