Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
ommatidium
←
English
(suffix)
←
English
idium
(suffix)
←
Ancient Greek
ὄμμα
(derived)
→
English
ommatidial
(suffix)