Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
třetí
←
Proto-Slavic
*tretь
(inherited)
→
Czech
třetina
(affix)
→
Czech
třeťák
(suffix)
→
Czech
potřetí
(compound)