PS

*ṣ̂rṭ - to fart, break wind audibly (SED I No. 71ᵥ)

Akkadian
ṣarātu - to fart (CAD Ṣ 107, AHw. 1085)
Syriac
ˁrṭ - (pa.) to break wind (LSyr. 54, SL 1137)
Syriac
ˁurṭē, ˁurṭāyā - stomach growling (LSyr. 548, SL 1087)
Arabic
ḍrṭ - to fart (BK 2 22, Lane 1786)
Mehri
ẑərūṭ - to fart (audibly) (ML 478)
Jibbali
ẓ̂érɔ́ṭ - to fart (audibly) (JL 327)
Harsusi
ẑərōṭ - to fart (audibly) (HL 152)
Soqotri
ẑəróṭ - to fart (audibly) (LS 365)

-t due to dissimilation of the «emphatics»?