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 *drugъ

→ Belarusian друг (inherited)
→ Belarusian другі (inherited)
→ Bulgarian дружен (mention)
→ Czech druh (inherited)
→ Czech druhý (inherited)
→ Kashubian drëch (derived)
→ Old Church Slavonic дроугъ (inherited)
→ Lower Sorbian drugi (inherited)
→ Upper Sorbian druhi (inherited)
→ Macedonian другар (inherited)
→ Macedonian дружина (mention)
→ Polish druh (derived)
→ Polabian draug (inherited)
→ Polabian drauďĕ (inherited)
→ Russian друг (inherited)
→ Russian дружба (mention)
→ Russian дружина (mention)
→ Russian дружный (mention)
→ Rusyn другый (inherited)
→ Serbo-Croatian drug (inherited)
→ Serbo-Croatian друг (inherited)
→ Serbo-Croatian drugi (inherited)
→ Serbo-Croatian други (inherited)
→ Serbo-Croatian družina (mention)
→ Serbo-Croatian дружина (mention)
→ Slovak druhý (inherited)
→ Slovene drugi (inherited)
→ Slovene družina (mention)
→ Ukrainian друг (inherited)
→ Ukrainian дружина (mention)
→ Ukrainian другий (inherited)