Reconstructions

PWS
*ṣVp(p)Vr- - (kind of small) bird (SED II No. 212)
PWS
*ṣpn - to hide, to cover (EDA I)
PWS
*ṣrb - to cut (Kogan 2015:575)
PWS
*ṣwb - to be fitting (SEDonline)

One wonders whether PWS *wṣb/*nṣb ‘to stand, to be erect; to be firm, stable’ may be further related as variant roots.

PWS
*ŝˁl - to be white, bright (Kogan 2015:36)
PWS
*ŝabḥ/*ŝVbḥ- - fat (SED I No. 261; Kogan 2015: 113)

Cf. *ŝaḥm- "fat", level?

PWS
*ŝgr - to entangle, to interweave (CDG 527, Kogan 2015:43)
PWS
*ŝky - to look (Naumkin et al. 2022:279)
PWS
*ŝpḳ - to be sufficient, to be abundant (Naumkin et al. 2022:276)

From Aramaic this root was borrowed into Akkadian as sapāḳu ‘to be sufficient’.

PWS
*ŝV(n)pVl- - stomach (of an animal, bird) (SED I No. 271)

Separated from Sem. *špl 'to be low' for phonetic reasons.