PS

*šit- - buttocks (SED I No. 255; Kogan 2011: 218)

Ugaritic
št - base, foot (DUL 851)
Phoenician
ˀšt - pillar (Tomback 1978: 36)
Hebrew
šēt - buttocks; base, foundation (HALOT 1666)
Syriac
ˀeštā - buttocks, rump; bottom (LSyr. 810, SL 108)
Mandaic
ˁšta - basis, bottom, posterior, anus, buttocks (MD 358)
Mandaic
šata - buttocks, pubic regions (MD 446)
Arabic
ˀist- - podex, anus (BK 1 31, Lane 56)
Arabic
sath-, satah-, sitah- - buttocks, posteriors, rump (BK 1 1051, Lane 1306)
Selti
suto - flesh of back above the hip (EDG 556)
According to Leslau, from Cush. (Hadiya suto), but hardly so in view of the comparative data.
Chaha
šät - leveled ground before a house is built (EDG 587)
Ezha
šet - leveled ground before a house is built (EDG 587)
Endegen
ušt - waist (EDG 102)
Muher
šät - leveled ground before a house is built (EDG 587)
Mehri
šīt - buttocks (ML 396)
Jibbali
s̃ét, šɔ̄ - buttocks (JL 264)
Harsusi
šīt - backside, posterior (HL 125)
Soqotri
šɛʰ - genital organs, pudenda (LS 413; CSOL I 656; Naumkin et al. 2013b:561)