Comment: Cf. also Ag. Bursh. it:-aj xis. The stem demonstrates the PL *a/*i Ablaut (ä in Rut. is not quite clear) and belongs to the weak conjugation class; the Kryz. and Bud. forms are reduplicated. Tab. and Ag. have preserved only participial forms combined with auxiliary verbs. Cf. also the PL derivate *jic̣:al(a) 'sickness, disease, pain': Lezg. ṭal, Ag. it:al, Rut. jaddal (Shin. jatal, Mükhr. jed:al, Mishl. jadal).
See Бокарев 1961, 71; Лексика 1971, 135; Гигинейшвили 1977, 107.