Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish reo
Proto-Celtic *ɸreswos (inherited)
Irish reodh (link)
Irish reódh (link)
Irish coinlín reo (link)
Irish coinneal reo (link)
Irish gabhairín reo (link)
Irish gabhar reo (link)
Irish frithreo (link)
Irish reo-chumhscú (link)
Irish reoigh (link)
Irish reoite (link)
Proto-Indo-European *prews- (inherited)
Middle Irish reód (inherited)
Old Irish réud (inherited)

Welsh rhew (cognate)
Irish (alter)
Irish reoigh (affix)
Irish reo-chumhscú (compound)
Irish aithreo (affix)
Irish frithreo (affix)