Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
idio-
←
Ancient Greek
ἴδιος
(derived)
→
English
idiosyncrasy
(affix)
→
English
idiopathic
(affix)
→
English
idioglossia
(affix)
→
English
idiopath
(affix)