Third-person singular simple present indicative form of knap

A protuberance; a swelling; a knob. / The crest of a hill / A small hill

A sharp blow or slap.

(transitive) To shape a brittle material having conchoidal fracture, usually a mineral (flint, obsidian, chert etc.), by breaking away flakes, often forming a sharp edge or point.

present participle of knap

simple past tense and past participle of knap

present participle of knapsack

(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.

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

Third-person singular simple present indicative form of knapsack