Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *h₂erkʷo-

→ Catalan arc (inherited)
→ Spanish arco (derived)
→ French arc (inherited)
→ Galician Alcobre (derived)
→ Indonesian arku (derived)
→ Indonesian arkus (derived)
→ Italian arco (derived)
→ Latin arcus (inherited)
→ Norwegian Bokmål ark (derived)
→ Norwegian Bokmål A4-ark (derived)
→ Norwegian Bokmål A3-ark (derived)
→ Norwegian Bokmål A5-ark (derived)
→ Norwegian Bokmål A5-papir (derived)
→ Portuguese arco (derived)
→ Romanian arc (derived)