Tocharian A ak

← Proto-Indo-European *okʷs (inherited)

← Proto-Indo-European *h₃okʷ- (mention)

← Proto-Indo-European *h₃ekʷ- (mention)

← Proto-Tocharian *ëk (inherited)

← Tocharian B ek (cognate)

→ Tocharian B ek (cognate)