Proto-Nakh: *sṭab(ʡ)V / *bʡastV
Meaning: 1 autumn 2 spring
Chechen: bʕästē 2
Ingush: bʕästi 2
Batsbi: sṭabo 1
Comments: The Chech.-Ing. form is metathesized and has a *-jV-suffix (without it cf. Chech. bʕästa 'in spring'). Vowel length is not clear.