Latin radiō

→ Spanish radiar (mention)

→ Spanish rayar (mention)

→ French radiateur (derived)

→ French radier (mention)

→ Old French raier (mention)

→ Italian radiare (mention)

→ Italian radiante (mention)

→ Italian raggiare (mention)

→ Latin radians (mention)

→ Latin radiaturus (mention)

→ Latin radiatus (mention)

→ Latin radiandus (mention)

→ Old Occitan rayar (mention)