PS

*ŝVbVr- - buttocks, hind parts, small of the back (SED I No. 262)

Akkadian
šuburru - buttocks, rectum, anus (CAD Š₃ 190, AHw. 1259)
Ugaritic
šbr - ano (Del Olmo 1992: 240)
Arabic
šabr-, šibr- - taille (waist) (BK 1 1183)
Tigre
šəbər - hind-quarter and tail-piece of a slaughtered animal (WTS 216)