Knap

(n.) A protuberance; a swelling; a knob; a button; hence, rising ground; a summit. See Knob, and Knop.

Knap - Other Definitions

(n.) A protuberance; a swelling; a knob; a button; hence, rising ground; a summit. See Knob, and Knop.
(v. t.) To bite; to bite off; to break short.
(v. t.) To strike smartly; to rap; to snap.
(v. i.) To make a sound of snapping.
(n.) A sharp blow or slap.