Proto-North Caucasian: *ʎ_ä̆[m]c̣V (/*ʎ_wä̆_c̣V)
Meaning: to sift, to filter
Notes: Reconstructed for the PEC level. The PL form is metathesized. The PN form reflects the original shape *ʎä̆mc̣_V (without labialisation of the first consonant, and with *-ṭṭ- pointing to a cluster with nasal); all other languages reflect a secondary form *ʎwä̆c̣_V with metathesis of labialisation. Despite these peculiarities (explained by the rare verbal *CVRCV- root structure), the etymology seems reliable.
