Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
sincer
←
Catalan
sencer
(doublet)
←
Latin
sincerus
(derived)
→
Catalan
sencer
(doublet)
→
Catalan
sincerament
(suffix)