Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Portuguese -idão
← Latin -tudo (derived)
← Portuguese -itude (doublet)
← Old Portuguese -idõe (inherited)

→ Portuguese -itude (doublet)
→ Portuguese escravidão (affix)
→ Portuguese gratidão (affix)
→ Portuguese prontidão (affix)
→ Portuguese frouxidão (affix)