PS

*ˀVrāw­, *wVrāˀ­ - back (SED I No. 10)

Akkadian
erûtu - back (CAD E 327, AHw. 248)
Var. arûtu.
Arabic
warāˀ- - location that is behind, beyond; the time past (BK 2 1527, Lane 2933)
Cf. warāniyat- ‘cul, derrière’ [BK 2 1525] (compared to the present root in [DRS 631]).
Geez
ˀurāˀu - waist (CDG 36)