PS

*nayab- - canine tooth (SED I No. 203)

Level?

PWS
*nāb-, *nīb- - canine tooth (SED I No. 203; Kogan 2011: 223)

Akkadian
nayabtu - floating rib or cartilage at the tip of the rib (CAD N₁ 151, AHw. 717)
According to von Soden, nayyābu ‘ein innerer Körpert. nahe der Galle’ (AHw. 717).