KNAPSACK

backpack, back pack, knapsack, packsack, rucksack, haversack

(noun) a bag carried by a strap on your back or shoulder

Source: WordNet® 3.1

Etymology

Noun

knapsack (plural knapsacks)

(chiefly, US) A case of canvas or leather, for carrying items on the back.

(cryptography) A set of values from which a subset is chosen.

Synonyms

• backpack

• rucksack

Verb

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

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

Synonyms

• backpack

Source: Wiktionary

Knap"sack`, n. Etym: [D. knapzak; knappen to eat + zak a bag. See Knap, v. t., and Sack.]

Definition: A case of canvas or leather, for carrying on the back a soldier's necessaries, or the clothing, etc., of a traveler. And each one fills his knapsack or his scrip With some rare thing that on the field is found. Drayton.

Source: Webster’s Unabridged Dictionary 1913 Edition