PS

*rāḥ-at- - palm (SED I No. 230, Kogan 2011: 223)

Akkadian
rittu - hand, claw, paw; handful (CAD R 383, AHw. 990)
Ebla
la-ˀà-tum - ŠU.ŠÀ (VE 516; Krebernik 1983: 19)
Ebla
ra-ˀà-tum - ŠU.SAL (VE 517; Krebernik 1983: 19)
Ugaritic
rḥt - palm of the hand (DUL 738)
Hebrew
raḥat - winnowing shovel (HALOT 1222)

Note a meaning shift < *raḥt-, with shortening of *ā in a closed syllable, a process common in Hbr. 

Arabic
rāḥat- - palm of hand (Lane 1181)
Geez
ˀərāḥ - palm (CDG 38)
Tigre
räḥat - palm of the hand, sole of foot (WTS 147)
Tigrinya
raḥ ˀid - palm of hand (Bass. 150)
Mehri
rəḥāt - palm of hand (ML 333)
Jibbali
irɔ́ḥɔ́t - palm of hand (JL 218)
Harsusi
ərḥāt - palm of the hand (HL 107)
Var. rīḥet