Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
diagonal
←
Ancient Greek
διαγώνιος
(derived)
←
Latin
diagōnālis
(derived)
→
Catalan
diagonalment
(suffix)