Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
потім
←
Belarusian
потым
(cognate)
←
Czech
potom
(cognate)
←
Polish
potem
(cognate)
←
Russian
потом
(cognate)
←
Proto-Slavic
*potomь
(inherited)
←
Proto-Slavic
*po
(compound)
←
Proto-Slavic
*tъ
(compound)