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

→ Irish -aí (inherited)
→ Manx -id (inherited)
→ Old Irish cruitt (affix)
→ Old Irish rímid (affix)
→ Old Irish sercaid (affix)
→ Old Irish ainmmnid (affix)
→ Old Irish dáilid (affix)
→ Old Irish toschith (affix)
→ Old Irish dartaid (affix)