I. ˈnäk noun
Etymology: Middle English nocke notched tip on the end of a bow; akin to Middle Dutch nocke summit
Date: 14th century
1. : one of the notches cut in either of two tips of horn fastened on the ends of a bow or in the bow itself for holding the string
2.
a. : the part of an arrow having a notch for the bowstring
b. : the notch itself
II. transitive verb
Date: 14th century
1. : to make a nock in (a bow or arrow)
2. : to fit (an arrow) against the bowstring