Comment: Obl. base *neIƛ̣:ʷɨ- (cf. Lezg. niḳi-, Tsakh. nek:ɨ-); cf. also Tsakh. Gelm. noIk (noIki-) which points to labialisation of *ƛ̣:ʷ and pharyngealisation in PL. 4th class in all class-distingushing languages.
See Trubetzkoy 1922, 241 (suggesting also a relationship with And. =eƛ̣:- 'to plough' - which is probably wrong, see PEC *=ērƛ̣_V).
