Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*dumati
→
Czech
dumat
(inherited)
→
Polish
dumać
(inherited)
→
Russian
думать
(inherited)
→
Ukrainian
думати
(inherited)