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

→ Belarusian быць (inherited)
→ Belarusian каб (compound)
→ Bulgarian съм (inherited)
→ Czech být (inherited)
→ Czech buď (mention)
→ Kashubian bëc (inherited)
→ Old Church Slavonic бꙑти (inherited)
→ Old Church Slavonic бꙑвати (affix)
→ Old Church Slavonic бꙑтиѥ (inherited)
→ Lower Sorbian byś (inherited)
→ Upper Sorbian być (inherited)
→ Macedonian сум (inherited)
→ Polish być (inherited)
→ Romanian biv (mention)
→ Russian быть (inherited)
→ Russian кабы (compound)
→ Serbo-Croatian biti (inherited)
→ Serbo-Croatian neste (mention)
→ Serbo-Croatian nisu (mention)
→ Serbo-Croatian бити (inherited)
→ Serbo-Croatian бит (inherited(sh/bg))
→ Serbo-Croatian nesu (mention)
→ Serbo-Croatian nisam (mention)
→ Serbo-Croatian niste (mention)
→ Serbo-Croatian nijesam (mention)
→ Serbo-Croatian nesam (mention)
→ Serbo-Croatian nijesmo (mention)
→ Serbo-Croatian nismo (mention)
→ Serbo-Croatian nesmo (mention)
→ Serbo-Croatian nijeste (mention)
→ Serbo-Croatian nijesu (mention)
→ Serbo-Croatian несу (mention)
→ Serbo-Croatian нису (mention)
→ Serbo-Croatian нијесу (mention)
→ Serbo-Croatian несмо (mention)
→ Serbo-Croatian несте (mention)
→ Serbo-Croatian нисте (mention)
→ Serbo-Croatian нијесте (mention)
→ Serbo-Croatian нијесмо (mention)
→ Serbo-Croatian нисмо (mention)