Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old Church Slavonic -ѧ
← Proto-Slavic *-ę (inherited)

→ Old Church Slavonic жрѣбѧ (suffix)
→ Old Church Slavonic телѧ (suffix)
→ Romanian Daia (affix)