Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
trou
←
Catalan
trauc
(cognate)
←
Latin
torus
(mention)
←
Occitan
trauc
(cognate)
→
Esperanto
truo
(borrowed)
→
French
trouer
(suffix)