Knap
Knap (nap) , noun
[Anglo-Saxon cnap, cnapp, top, knob, button; compare Icelandic knappr knob, Swedish knapp, Danish knap button, Welsh, Gael., & Ir. cnap knob, button, and English knop.]
Knap , transitive verb
[Dutch knappen to chew, bite, crack, take hold of; prob. of imitative origin.]
1.
To bite; to bite off; to break short. [Obsolete or Provincial English]
He will knap the spears apieces with his teeth.
He breaketh the bow, and knappeth the spear in sunder.
2.
To strike smartly; to rap; to snap. [Chiefly British] — Bacon
Knap , intransitive verb
To make a sound of snapping. — Wiseman
Knap , noun
A sharp blow or slap. — Halliwell