Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
čtvrtý
←
Polish
czwarty
(cognate)
←
Russian
четвёртый
(cognate)
←
Slovak
štvrtý
(cognate)
←
Proto-Slavic
*četvьrtъ
(inherited)
→
Czech
čtvrtek
(suffix)
→
Czech
čtvrťák
(suffix)