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

→ Irish athraigh (inherited)
→ Irish aithrí (mention)
→ Irish athrach (mention)
→ Scottish Gaelic atharraich (inherited)
→ Manx arree (inherited)
→ Old Irish diandaithirsid (mention)
→ Old Irish indaithirset (mention)