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

→ Estonian kaup (derived)
→ Norwegian Bokmål kjøpe (inherited)
→ Norwegian Bokmål kjøp (inherited)
→ Norwegian Bokmål ab-kjøp (inherited)
→ Dutch koop (inherited)
→ Old Norse kaupa (derived)
→ Old Frisian kap (inherited)