Definition from Wiktionary, the free dictionary
From Middle Dutch knape, from Old Dutch *knapo, from Proto-Germanic *knappô (“boy, youth”), from Proto-Indo-European *gnebʰ- (“to press, tighten”). Compare German Knappe, Knabe, English knave, knape, Danish knabe, Icelandic knapi.
- boy, usually adolescent
- (by extension) Any human male, regardless of age
- (chiefly in compounds) A servant, helper
- A big one, whopper, said of a creature or an object