Proto-North Caucasian: *ʔVḳ_wV
Meaning: to kill
Notes: An And-WC isogloss (see Абдоков 1983, 171). The correspondence is not quite regular: with a tense phonation we would rather expect *q̇ʷǝ- or *ʁʷǝ- in PWC. Perhaps we should reconstruct *-VḳwV, regularly yielding PWC *ḳʷǝ- and acquiring a secondary (expressive) tenseness in PA? At any rate, it is hard to separate the PA and PWC forms.
