Proto-West-Caucasian: *ƛ̣V
Meaning: 1 bottom, lower part 2 under (preverb)
Abkhaz: á-c̣a 1
Abaza: c̣-ʕʷa 1
Adyghe: č̣́a- 2
Kabardian: ṣ́a- 2
Ubykh: -ć̣a 1
Comments: PAT *c̣V (cf. also Bzyb. á-c̣ 'bottom); PAK *č̣́a-; in Ub. the morpheme is used in compounds: ba-ć̣á 'lower part', ša-ć̣á 'pillow' (ša 'head').
The correspondence PAK *č̣́ : PAT *c̣ : Ub. ć̣ points to the PWC lateral *ƛ̣. In PAK, however, there exists also a separate root *č̣a 'bottom' (Ad. č̣a, Kab. ṣ́a) - which can reflect a variant with labialisation *ƛ̣ʷV (perhaps reflecting an early PWC metathesised variant *Hnŏƛ̣ŭ).
