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

→ Bulgarian лек (inherited)
→ Macedonian лек (inherited)
→ Polish lek (inherited)
→ Romanian leac (derived)
→ Serbo-Croatian lek (inherited)
→ Serbo-Croatian lijek (inherited)
→ Serbo-Croatian лек (inherited)
→ Serbo-Croatian лијек (inherited)
→ Ukrainian лік (inherited)