Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Welsh -dod
Ancient Greek -της (cognate)
Proto-Indo-European *-teh₂ts (derived)
Cornish -ses (cognate)
Latin -tas (cognate)
Sanskrit -ताति (cognate)
Middle Welsh -dawt (inherited)

Welsh ysmaldod (affix)
Welsh ufudd-dod (affix)
Welsh brawychdod (affix)
Welsh cryndod (affix)
Welsh cymhlethdod (affix)
Welsh -dodau (compound)
Welsh syndod (suffix)