Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
to
←
Catalan
tro
(doublet)
←
Ancient Greek
τόνος
(derived)
←
Latin
tonus
(borrowed)
→
Catalan
tro
(doublet)
→
Catalan
semitò
(prefix)