knapsack

From Low German knapzak, or Dutch knapzak (older form cnapsack), knap from Middle Dutch cnappen (“to bite with teeth”) + sack. German Knappsack is from Dutch.

knapsack (plural knapsacks)

1. (US) A case of canvas or leather, for carrying items on the back.
2. (cryptography) A set of values from which a subset is chosen.

• backpack
• rucksack

knapsack (third-person singular simple present knapsacks, present participle knapsacking, simple past and past participle knapsacked)

1. To go hiking while burdened with a knapsack, usually overnight or for longer.

   My sleeping bag fell off my backpack into the water, while we were knapsacking up the mountain.

• backpack

• backpacking
• camping
• hiking