Reconstructions

PS
*ˀayy- - which? (Kogan 2009:72)
PS
*ˀayyal- - stag, deer (SED II No. 25, Fron. V 294)
PS
*ˀayl-, *ˀVl- - ram (SED II No. 24, DRS 17)
PS
*ˀayl(-ān)- - (a big poplar) (Fronzaroli 1969a, pp. 277, 290, 300)

Level?

PS
*ˀayat- - sign (Arkhipov 2019: 55)
PS
*ˁabaḳ- - sores, scabies, leprosy (SED I No. 18; Kogan 2011: 230)
PS
*ˁabVw- - kind of fish (SED II No. 27, HSED No. 1117)
PS
*ˁidḳ- - (lock/tuft of) hair, curl, fleece (SED I No. 12)
PS
*ˁḏb - to leave (DUL 148; HALOT 806; Kogan 2015: 309)
PS
*ˁaday - up to, until (Arakelova 2001:21)

It is not obvious that forms of the type (wV)d meaning "to, towards" are related to this preposition (Arakelova 2001:22). They are united into a separate lexeme, see *ˀVd/d.