Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old Irish -mad

→ Welsh -fed (cognate)
→ Irish -ú (inherited)
→ Cornish -ves (cognate)
→ Old Irish cethramad (affix)
→ Old Irish ochtmad (affix)
→ Old Irish óenmad (affix)
→ Old Irish cóecatmad (affix)
→ Old Irish sescatmad (affix)
→ Old Irish cétmad (affix)