Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
racional
←
Latin
ratiōnālis
(derived)
→
Catalan
racionalment
(suffix)
→
Catalan
racionalitzar
(suffix)