Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
œcuménique
←
Ancient Greek
οἰκουμενικός
(borrowed)
→
English
ecumenic
(mention)
→
French
œcuménisme
(affix)
→
French
œcuméniquement
(suffix)