Proto-West-Caucasian: *ʎ́ʷV
Meaning: 1 to boil 2 warm
Abkhaz: a-š-rá 1
Abaza: š-ra 1
Adyghe: fā-ba 2
Kabardian: xʷā-ba 2
Ubykh: šʷa-dá- 1
Comments: PAT *šǝ; PAK *xʷa-bá. Shagirov (2,106) takes from Ubykh another root: š́a- 'to be hot'. However, Ub. š́ can not correspond to PAK *xʷ, while Ub. šʷa-dá- is a perfect match for both AA and AK forms.
It is probable that Ub. š́a- 'be hot' goes back to another PWC root, *š́V (*š:́V) which is not reflected in PAK, but in PAT merged with *šǝ < *ʎ́ʷA. This seems probable because the Abkh. root means both 'boil' and 'become hot'.
