Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
próchno
←
Proto-Slavic
*porxъno
(inherited)
→
Polish
próchnica
(suffix)
→
Polish
próchnieć
(suffix)
→
Polish
próchnilec
(mention)