PS

*gbḫ - to be bald (on the forehead) (SED I No. 15v)

Semantically and phonetically very likely contaminated with gVbh(­at)­ ‘forehead, front’ (see SED I No. 68).

Akkadian
gubbuḫu - bald (CAD A 117, AHw. 295)
Var. ḳubbuḫu.
Hebrew
gibbēăḥ - with receding hair-line (HALOT 173)
Hebrew
gabbaḥat - receding hair-line; bare spot (HALOT 173)
Syriac
gbāḥā - bald on the forehead (LSyr. 101, SL 199)