Proto-North Caucasian: *gāmć̣wV
Meaning: canine tooth, fang
Notes: Reconstructed for the PEC level. An expressive root; besides rather usual for this structure assimilations (*g- > *ḳ-) there's an irregular vowel in PD (-i- instead of *-a-) and an irregular consonant in PTs (-c- instead of *-č̣-).