Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
llaurar
←
Catalan
laborar
(doublet)
←
Latin
labōrare
(inherited)
←
Old Occitan
laorar
(inherited)
→
Catalan
laborar
(doublet)
→
Occitan
laurar
(cognate)