Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
wdowiec
←
Polish
wdowa
(affix)
←
Polish
-iec
(affix)
←
Proto-Slavic
*vьdovьcь
(inherited)