PS

*nakap-at- - temple, cheek-bone (SED I No. 199; Kogan 2011: 220)

Scarcely but reliably attested in Akk. and Arb. only.

Akkadian
nakkaptu - temple (CAD N₁ 184, AHw. 722)

Double ­-kk­- remains to be explained. One of possible interpretations is nakkaptu < *ma-nkap-t- (on na- < *ma- see [GAG 39], on -­kk- < *-­nk- see [ibid. 42]).

Arabic
nakfat-, nakafat- - area between the jaw and the neck (BK 2 1344, Lane 3038)