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

→ Czech pěna (inherited)
→ Macedonian пена (inherited)
→ Polish piana (inherited)
→ Russian пена (inherited)
→ Serbo-Croatian pena (inherited)
→ Serbo-Croatian pjena (inherited)
→ Serbo-Croatian пјена (inherited)
→ Serbo-Croatian пена (inherited)
→ Slovak pena (inherited)
→ Slovene pena (inherited)
→ Ukrainian піна (inherited)