Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
учиться
←
Old East Slavic
учити
(inherited)
←
Old East Slavic
сѧ
(mention)
←
Russian
учи́ть
(affix)
←
Russian
-ся
(affix)
←
Proto-Slavic
*učiti
(derived)
←
Proto-Slavic
*sę
(mention)