nock (n.)youdaoicibaDictYouDict[nock 词源字典]
"notch on a bow," late 14c., of uncertain origin, probably from a Scandinavian source (such as Swedish nock "notch"), but compare Low German nokk, Dutch nok "tip of a sail." Perhaps connected to nook.[nock etymology, nock origin, 英语词源]
nock (v.)youdaoicibaDictYouDict
"fit (an arrow) to a bowstring," 1510s, from nock (n.). Related: Nocked; nocking.