Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*postъ
→
Czech
půst
(inherited)
→
Polish
post
(inherited)
→
Romanian
post
(derived)
→
Russian
пост
(inherited)
→
Serbo-Croatian
post
(inherited)
→
Serbo-Croatian
пост
(inherited)
→
Ukrainian
піст
(inherited)