Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish dobhar
Proto-Celtic *dubros (inherited)
Welsh dwfr (cognate)
Irish Gaoth Dobhair (link)
Irish uisce (link)
Proto-Indo-European *dʰewbʰ- (root)
Proto-Indo-European *dʰubʰrós (inherited)
Old Irish dobur (inherited)
Old Irish dobur (inherited)

English dub (cognate)
English Thames (cognate)
Welsh dŵr (cognate)
Irish dobhrán (suffix)
Irish dobharchú (affix)
Irish dobharshaothrú (affix)
Irish Gaoth Dobhair (mention)
Westrobothnian dur (cognate)