3 entries under this word
(năp), n. [A-S. cnăp, cnăpp, top, knob, button, Icel. knappr, knob, Sw. knapp, Dan. knap, button, W., Gael., & Ir. cnap, knob, button.]
(nāp), v. t. [imp. & p. p. KNAPPED (nāpt); p. pr. & vb. n. KNAPPING.] [D. knappen, to chew, bite, crack, take hold of; Ger. knappen, to knap, crack. Cf. KNAB.] 1. To bite; to bite off; to break short. [Obs.] He will knap the spears a-pieces with his teeth. More. 2. To strike with a loud noise; to snap. “As lying a gossip as ever knapped ginger.” Shak. Knap a pair of tongs some depth in a vessel of water, and you shall hear the sound of the tongs. Bacon.
(nāp), v. i. To make a short, sharp sound; to snap.
The people standing by heard it knap in, and the patient declared it by the ease she felt. Wiseman.