Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
púrpura
←
Catalan
porpra
(doublet)
←
Ancient Greek
πορφύρα
(derived)
←
Latin
purpura
(borrowed)
→
Catalan
porpra
(doublet)