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

→ Irish dúbhoc (affix)
→ Irish dúliath (affix)
→ Irish dúshaothrú (affix)
→ Irish dúghafach (affix)
→ Irish dúghorm (affix)
→ Irish dúchroíoch (affix)