Proto-North Caucasian: *swĭrā (~ -ɨ̆-,-ǝ̄)
Meaning: a k. of milk product
Notes: Reconstructed for the PEC level. Correspondences are regular. The semantic development must be explained as (*'milk') > 'sour milk' > 'alcoholic beverage made of milk' (a rather common drink for steppe and mountain cultures).
