Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *sweḱsḱomt

→ Catalan seixanta (inherited)
→ Spanish sesenta (inherited)
→ French soixante (inherited)
→ Italian sessanta (inherited)
→ Latin sexaginta (derived)
→ Portuguese sessenta (inherited)
→ Sardinian sessanta (inherited)