Tocharian A kus

← Proto-Indo-European *kʷusó (inherited)

← Proto-Indo-European *kʷos (mention)

← Proto-Indo-European *kʷis (mention)

← Proto-Tocharian *kuse (inherited)

← Tocharian B kᵤse (cognate)

→ Tocharian B kᵤse (cognate)