Welsh ar-

← Proto-Brythonic *ar- (inherited)

← Proto-Celtic *ɸare (inherited)

→ Welsh ardal (prefix)

→ Welsh dar- (compound)

→ Welsh cyfarfod (affix)

→ Welsh archoll (affix)

→ Welsh arholi (affix)

→ Welsh archwilio (affix)

→ Welsh arddodi (affix)

→ Welsh arbrofi (affix)

→ Welsh arbrawf (affix)

→ Welsh arddangos (affix)

→ Welsh argyfwng (affix)

→ Welsh arwr (affix)

→ Welsh arolwg (affix)

→ Welsh argraff (affix)

→ Welsh arwerthu (affix)

→ Welsh arfod (affix)

→ Welsh argoel (affix)

→ Welsh arfor (affix)

→ Latin Arelate (cognate)