Welsh clust

← Proto-Brythonic *klʉst (inherited)

← Proto-Celtic *kloustā (inherited)

← Proto-Indo-European *ḱlew- (root)

← Proto-Indo-European *ḱlew- (derived)

→ Welsh clustiau (affix)

→ Welsh clustdlws (compound)

→ Welsh clustffon (compound)

→ Irish cluas (cognate)

→ Irish clois (cognate)