Proto-Nakh: *(ʔa)sṭo
Meaning: chisel
Chechen: sto
Ingush: osta
Batsbi: sṭo
Comments: 5th class in Chech. and Bacb., 3d class in Ing. Cf. also Chech. Lev., Cheb. stwo, Akk. āsta (with not quite clear vowel length - to judge from the reduction in most Chech. dialects and Bacb., the initial vowel in PN must have been short).