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

→ Czech hezký (suffix)
→ Old Church Slavonic къто (mention)
→ Old Church Slavonic кꙑи (mention)
→ Lower Sorbian kenž (derived)
→ Russian каждый (mention)
→ Russian кой (mention)