PAK *nǝsá. Shagirov 1, 288 supposes that the Ub. form is borrowed from Adygh (PAK *nǝsá-ʁʷǝ 'sister-in-law'); but this supposition does not explain loss of labialisation in Ub. It seems more probable that the Ub. and AK forms are genetically related. Despite Abdokov 1973, 62 the AK and Ub. words can not be related to Abkh. aca, Abaz. taca, Ub. śaśa 'bride, daughter-in-law' (see Shagirov ibid.). The Adygh forms were borrowed in Osset. (Dig.) nissä 'lady', Chan. nisaʁa, nusaʁa 'two daughters-in-law'. The latter form (undoubtedly borrowed < PAK *nǝsaʁʷǝ) makes it probable that other scattered Kartvelian forms (Georg. nusa-dia 'sister-in-law', Megr. nosa, nisa, Chan. nusa, nisa 'daughter-in-law') also have a WC origin.