Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *keh₂i-

→ Catalan cel (mention)
→ Spanish cielo (mention)
→ French ciel (mention)
→ Italian cielo (mention)
→ Latin caelum (mention)
→ Neapolitan cielo (mention)
→ Portuguese céu (mention)
→ Romanian cer (mention)