Proto-Nakh: *sō
Meaning: I
Chechen: so
Ingush: so
Batsbi: so
Comments: The PN paradigm is *sō (nom.), *sa- (gen., cf. Chech. sa-n, Bacb. sa-jĩ), *ʔas (erg., cf. Chech. as, Ing. az). The length in *sō is regularly shortened, but has been preserved in derivate forms like *sō-nu (dat.) > Chech. sū-na.