*sˀin - edge, hem (Kogan 2015:341)

More traditional interpretations found in CAD S 388 (‘a piece of clothing or part thereof’) and AHw. 1059 (‘ein Tuch oder Binde’) are likely to be rejected (Moran 1983). According to AHw. 1059, the Akkadian term is borrowed from Sum. tùn, but this is difficult to reconcile with the Ugaritic evidence (let alone the internal Akkadian difficulties outlined in Moran 1983) (Kogan 2015: 341)

Moran 1983: perhaps an old loanword from Akk. before the loss in the latter of the aleph, or perhaps both going back to a common source and the textile vocabulary of the third millennium B.C.? see also Akk sūnu