PS

*ŝayp - foot, sole of foot (SED I No. 269)

Proto-MSA
*ŝa(ˀ)p- - trace, foot (SED I No. 269, Kogan 2011: 225)

Akkadian
šēpu - foot (CAD Š₂ 294, AHw. 1214)
Syriac
šepā - upper part; point of the nose (LSyr. 794, SL 1585)
May be related with š- instead of the expected s-.
Arabic
šabāt- - the point of the extremity of anything; the portion with which one cuts (in a sword); the two sides of the tapering head of a sandal (BK 1 1188, Lane 1501)

May be related.

Endegen
čämbä - sole of foot serving as measure (EDG 173)
Though regarded by Leslau as loans from C. Cush., these forms rather belong to this root representing cases of Gur. č rendering š (v. EDG LXII).
Ennemor
čämba - sole of foot serving as measure (EDG 173)
Though regarded by Leslau as loans from C. Cush., these forms rather belong to this root representing cases of Gur. č rendering š (v. EDG LXII).
Gyeto
čämba - sole of foot serving as measure (EDG 173)
Though regarded by Leslau as loans from C. Cush., these forms rather belong to this root representing cases of Gur. č rendering š (v. EDG LXII).