*ŝadaw- - open country, wild, uncultivated place
(Fronzaroli 1968: 269‒270, 287; Kogan 2011: 190; Kogan 2015: 307)
reconstruction with *-w (rather than -y) seems to be assured by well-attested spellings with -u-/-w- in Sargonic (śa-dú-e, śa-dú-im) and Old Assyrian (ša-ad-wi-im, ša-du-im), v. Kienast 1994:278‒280 and CAD Š₁ 51 respectively