Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
obyczaj
←
Proto-Slavic
*obyčajь
(inherited)
→
Polish
obyczajowy
(suffix)
→
Polish
obyczajny
(suffix)