PWS

*šāḳ- - leg, shin (SED I No. 241, Kogan 2011: 225)

Akkadian
sīḳu - lap, thigh (CAD S 305, AHw. 1049)
Var. sāḳu.
Can be compared to PWS *šāḳ- ‘leg, shin’.
Ugaritic
šḳ - thigh (Gordon 1965: 488)
Hebrew
šōḳ - thigh, fibula; shank of an animal (HALOT 1448)
Official Aramaic
šḳ - thigh (DNWSI 1186)
highly uncertain
Biblical Aramaic
šāḳṓhī (du. suff.) - Schenkel (HALAT 1795)
Jewish Palestinian Aramaic
šḳ - foreleg (DJPA 564)
Syriac
šāḳā - thigh (LSyr. 765, SL 1592)
Mandaic
šaḳa - limb, leg, shin (MD 445)
Mlaḥso
čoḳo - Bein, Unterschenkel, Fuss (leg, lower leg, foot) (Jastrow 1994: 171)
Arabic
sāq- - shank; leg (Lane 1471, BK 1 1167)
Geez
ṣakʷ - hip, hipbone, thigh, thighbone, flesh of thigh, shoulder blade (CDG 149)
Var. ṣak, ṣok. Leslau considers unlikely the connection with the present root suggested by Brockelmann. Indeed, shift of glottalization is difficult to explain.
Tigre
səḳuḳa - forearm; lower part of the leg (WTS 182)
can be compared to PWS *šāḳ- ‘leg, shin’