←
Old Church Slavonic оуста (cognate)
←
Proto-Indo-Iranian *HáHs (inherited)
←
Proto-Indo-Iranian *HaHs- (inherited)
←
Proto-Indo-European *h₁óh₃s (inherited)
←
Proto-Indo-European *h₁eh₁s- (inherited)
←
Sanskrit आस्ते (mention)
→
Kashmiri آسُن (mention)
→
Sanskrit ओष्ठ (mention)