Knap /(năp)/

Knap

n.
  1. A protuberance; a swelling; a knob; a button; hence, rising ground; a summit. See Knob, and Knop.
    The highest part and knap of the same island.

Knap

v. t.

imp. & p. p. Knapped; p. pr. & vb. n. Knapping

  1. To bite; to bite off; to break short. [Obs. or Prov. Eng. ]
    He will knap the spears apieces with his teeth.
    He breaketh the bow, and knappeth the spear in sunder.
    — Ps. xlvi. 9 (Book of Common Prayer.)
  2. To strike smartly; to rap; to snap. [Chiefly Brit.]

Knap

v. i.
  1. To make a sound of snapping.

Knap

n.
  1. A sharp blow or slap.