Proto-Lezghian: *k:ʷalk:
Meaning: spine
Lezghian: k:ʷarg (Khl.)
Rutul: gʷarg
Comment: In Lezg. Khl. there is also a variant k:argʷ. 3d class in Rut. Preservation of liquid in Rut. points directly to PL *-l- (*-r- would have disappeared in this position).