Comment: Cf. also Lezg. erg. ʁet:re; Lezg. Khl. χIäd; Tab. Khan. χI:är; Ag. Tp. ʕad (all forms point unanimously to *χI:-, thus qI in the Arch. form - which is a compound with χI:olo-š- 'in the sky' - must be secondary, due to dissimilation after a fricative). Final -č̣ in Kryz. and Bud. is obviously due to assimilation before a front vowel (the obl. base in PL had been *χIan:ä-) which later got lost (the same is true for the Tab. Kand. form χIaǯ), although reasons for its glottalisation are less obvious. See Магометов 1966, 342.