Comments: PAT *ra (the Abaz. word means properly "nut-tree", cf. Abkh. a-rasá, Bz. a-raśá 'nut-tree'); PAK *da. Meaning of the component -q̇́a in Ub. is not clear. The correspondence PAT *r : PAK *d : Ub. L points to PWC *ĺ.
See Schmidt 1950, 19, Kuipers 1963, 59, Shagirov 1, 145.