Akkadian

ḳallû (gallû) - vulva (hapax) (CAD ḳ 66, AHw 894)

According to both dictionaries, from Sum. (GAL4 ‘Scham, Vulva’ [IK 301]).

PS
*ḳ(ʷ)Vlḥ- - genitals, testicles (SED I No. 171)