Reconstructions

Proto-MSA
*ˁān- - year (Kogan 2011: 197)
Proto-MSA
*ˁan-Vt- - skin (Kogan 2015:549)
The etymology is unknown.
Proto-MSA
*ˁapar- - cloud (Kogan 2015:269)
likely related with metathesis to Akk. erpetu ‘cloud’, Ugr. ˁrpt
Proto-MSA
*ˁpr - to be red (Bulakh 2004: 274–276; Kogan 2011: 189, 199)
Proto-MSA
*ˁar - but (Kogan 2015:549)
The etymology of Proto-MSA *ˁar ‘but’ is uncertain. A cognate relationship with Arb. γayr- is rather attractive, but ˁ instead of γ is hard to explain. (Kogan 2015:549)
Proto-MSA
*ˁ/ˀardīb - nape of the neck and the top of the shoulders (SED I 44, Kogan 2015:549–550)

Quoted under No. 45 as a variant root.

Proto-MSA
*ˁardVb- - nape (Kogan 2015:550)
The etymology is unknown.
Proto-MSA
*ˁarḳīb- - mouse (SED II No. 30; Kogan 2010: 209)
Proto-MSA
*ˁrr - to block, to withhold (Kogan 2015:550)
The origin is unknown.
Proto-MSA
*ˁrṣ̂ - to wean (LS 329)