PS

*raḥim- - womb; compassion, pity, kindness (SED I No. 231)

Akkadian
rēmu - womb; pity, compassion, mercy (CAD R 259, AHw. 970)
Ebla
rí-ˀeₓ(EN)-mu, rí-mu-um - É׊À (Krebernik 1983: 14, Blažek 1994: 80)
/reḥmum/
Phoenician
rḥm - seno (womb) (Fuentes 227)

in rḥm-y ‘su seno’

Hebrew
räḥäm - womb (HALOT 1217)
Deir Alla
rḥm - womb (DNWSI 1070)
Samaritan
rḥm - womb (DSA 828)
Jewish Babylonian Aramaic
raḥămā - office of the matrix, womb (Jastrow 1467)
Syriac
raḥmā - uterus, womb (LSyr. 724, SL 1456)
Arabic
raḥim-, raḥimat- - womb (BK 1 838, Lane 1056)
Tigre
rəḥəm - womb; descent (WTS 146)
May be an Arabism.
Tigrinya
rəḥmu - prone, face down (TED 540)
probably related
Mehri
raḥm - womb (ML 321)
Mehri
mərḥām - womb (ML 322)
Jibbali
raḥm - womb (JL 210)
Jibbali
mərḥám - womb (ML 322)