Comment: The reflexes reveal two basic structures of laryngeal features: a) with the initial voiceless *k- (Tab., Ag., cf. also Lezg. Kur. kurc̣ul, Khl. krc̣ɨl); with the initial glottalised *ḳ- (Arch. ḳonc̣ol, cf. also Lezg. Kuba. ḳurc̣ul; the literary Lezg. gurc̣ul is a result of dissimilation < *ḳurc̣ul). External evidence shows that the original Anlaut is *ḳ-; forms with *k- are a result of early dissimilation in glottalisation. In Arch. the word belongs to the 4th class.
See Лексика 1971, 160; Гигинейшвили 1977, 101; Талибов 1980, 206.