Ebla

ga-za-um /kas(a)Lum/ - back (VE 665, Kogan–Krebernik 2021b: 687)

Var. gi-za-um /kis(a)Lum/ (EV 359)

PS
*kVsl- - lower part of the trunk, genitals (SED I No. 153; Kogan 2011: 218)