Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
ração
←
Latin
ratiō
(borrowed)
←
Portuguese
razão
(doublet)
←
Old Portuguese
raçon
(inherited)
→
Portuguese
razão
(doublet)