Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
jęczeć
←
Proto-Slavic
*ęčati
(inherited)
→
Polish
Jęcek
(mention)
→
Polish
Jęczeń
(mention)
→
Polish
jęknąć
(suffix)
→
Polish
pojękiwać
(affix)