Welsh rhwydd

← Breton rouez (cognate)

← Proto-Brythonic *rruɨð (inherited)

← Proto-Celtic *rēdis (inherited)

← Czech řídký (cognate)

← Irish réidh (cognate)

← Proto-Indo-European *h₁réh₁-dʰi (derived)

← Proto-Indo-European *h₁réh₁ (mention)

← Old Welsh ruid (inherited)

→ Welsh hyrwyddo (prefix)

→ Irish réidh (cognate)