Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Romanian opt
← Proto-Indo-European *oḱtṓw (inherited)
← Latin octō (inherited)

→ Dalmatian uapto (cognate)
→ Romanian optime (suffix)
→ Romanian optsprezece (mention)
→ Romanian optzeci (mention)
→ Romanian optulea (affix)
→ Aromanian optu (cognate)