*ḳVrb- - inner part, middle of the body (SED I No. 165)

Akkadian

ḳerbu - intestines, insides (in the pl.), mind, heart (CAD ḳ 216, AHw 914)

Ugaritic

ḳrb - midsection (WUS 282)

ḳirbu(m)

Hebrew

ḳäräb - entrails, inward parts (HALOT 1135)

Arabic

qurb- - flanks, from the hips to the lower abdomen (BK 2 704)

u < *a accomodated to b ?