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Welsh goddef
Proto-Brythonic *gwoðėβ̃jɨd (inherited)
Proto-Celtic *uɸodamyeti (inherited)
Proto-Indo-European *demh₂- (root)
Old Irish fo·daim (cognate)
Middle Welsh goðef (inherited)

Welsh dioddef (affix)
Welsh goddefedd (affix)
Welsh goddefgar (affix)
Welsh goddefiad (affix)
Welsh goddefol (affix)
Old Irish fodaim (cognate)