Reconstructions

PS
*ˀatān- - donkey mare (SED II No. 19, Fron. VI 31, DRS 36)
PS
*ˀaṭad- - (a thorny plant) (Fronzaroli 1969a, pp. 278, 291, 300)
PS
*ˀaṯ(h)al- - a mythical reptile, dragon (SED II No. 20)

Level?

PS
*ˀVṯkāl- - cluster, bunch (of grapes etc.) (Kogan 2011: 204, Kogan 2012: 256–257)
PS
*ˀaṯl- (*ˀiṯl-) - tamarisk (Kogan 2012: 235, n. 24)

Lost in Akk. because of the loss of distinction between *ˀaṯl- 'tamarisk' and *ˀašal- 'cane, rush'.

PS
*ˀaṯar- - footstep, trace (Kogan 2015:393)
PS
*ˀVwVy- - jackal (SED II No. 21, DRS 12)

Level? Possibly a descriptive root.

PS
*ˀa/iw(a)z-, *waz(z)- - goose (SED II No. 22, DRS 12)
PS
*ˀī/*ˀay - no, not (HALOT 38; CDG 1; Kogan 2015: 281)
PS
*ˀay- - bird of prey (SED II No. 23, DRS 18)