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

→ Catalan fil (derived)
→ Spanish hilo (derived)
→ French fil (derived)
→ Italian filo (derived)
→ Latin filum (derived)
→ Portuguese fio (derived)
→ Romanian fir (derived)