Welsh rhew

← Breton rev (cognate)

← Proto-Celtic *ɸreswos (inherited)

← English freeze (cognate)

← Irish reo (cognate)

← Proto-Indo-European *prews- (inherited)

← Cornish rew (cognate)

← Old Irish réud (cognate)

→ English freeze (mention)

→ Welsh rhewi (affix)

→ Welsh rhewllyd (affix)

→ Welsh rhewgell (compound)