Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old Norse -tigi
← Proto-Germanic *tigiwiz (derived)
← Proto-Germanic *teguz (mention)

→ Old Norse fimtigi (suffix)
→ Old Norse fimmtigi (suffix)
→ Old Norse sextigi (suffix)
→ Old Norse fjórutigi (suffix)
→ Old Norse þrjátigi (suffix)