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

→ Belarusian гай (inherited)
→ Czech háj (inherited)
→ Polish gaj (inherited)
→ Russian гай (inherited)
→ Serbo-Croatian gaj (inherited)
→ Serbo-Croatian гај (inherited)
→ Ukrainian гай (inherited)
→ Ukrainian гаяти (mention)