Reconstructions

PS
*ˁapar- - soil; soft surface of the earth used for cultivation and as a building material (soil, dust) (Fronzaroli 1968: 270, 287; HALOT 861, Kogan 2011: 189; Kogan 2015: 530)
PS
*ˁarˁar- - (a plant) (Kogan 2012: 242–244)
PS
*ˁrb/*γrb - to come in, to enter (Kogan 2015: 333;409)

The original meaning ‘to enter’ only in Akk. and Ugr. Elsewhere in WS, only derived meanings (such as ‘to set (sun)’ or ‘to stand surety’) are attested (HALOT 876, CDG 69). For MSA ‘strange, peculiar’ cf. also Tgr. ˁarba ‘something peculiar’ (WTS 460).

PS
*ˁa/urub- - kind of vermin, worm (SED II No. 36, Holma 1915: 91)
PS
*ˁarŝ- - bed (Steiner 1977:130‒136; Kogan 2015:387)
PS
*ˁurīṯ̣- - male kid (SED II No. 39; Kogan 2011: 206)
PS
*ˁrw - to be naked (BDB 789, HALOT 1770)
PS
*ˁVrw/y- - kind of wild cat (SED II No. 41)
PS
*ˁarw/y-, ˁawr- - bird of prey (SED II No. 40)
PS
*ˁu/irray(-at)- - intestines; excrement (SED I No. 22, DRS 636)
Scarcely but reliably attested. Phonetic reconstruction highly tentative.