Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Hellenic
*-tron
→
Ancient Greek
-τρον
(inherited)
→
Norwegian Bokmål
teater
(derived)
→
Norwegian Bokmål
absurdteater
(derived)