Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Belarusian вучыцца
Belarusian вучы́ць (affix)
Belarusian -ся (affix)
Old East Slavic учити (inherited)
Old East Slavic сѧ (mention)
Russian учи́ться (cognate)
Proto-Slavic *učiti (derived)
Proto-Slavic *sę (mention)
Ukrainian учи́тися (cognate)