1. nucifrangibulum — de Vaan
nucifrangibulum 'nutcracker' (PL). Pit. *knuk-. IE cognates: Ofr. cnu [f], gen. cnao, cno, ace. cnoi, MW cneu 'nuts', LCo. knyfan 'a nut', MBret. cnou, Bret, hraoh 'nuts' < PCL nom. *knus, obi. *knuu~ (< *£/iw-i/-?); OIc. hnot, OE hnutu 'nut' < *knu-d-. Lat. nuc(u)Ieus presupposes a diminutive *nuculus/-a. As argued s.v. nugae, the irregular alternations within Latin between nugae and nux already suggest a non-IE … — [de Vaan, s.v. nucifrangibulum, p. 434]