Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
ouvreur
←
French
ouvrir
(suffix)
←
French
eur
(suffix)
←
French
ouvrer
(suffix)
←
French
eur
(suffix)
←
French
opérateur
(doublet)
←
French
ouvrer
(link)
←
French
ouvrier
(link)
←
French
papetier
(link)
←
French
verrier
(link)
←
Old French
ovrëor
(mention)
←
Old French
ovreur
(mention)
←
Old French
ouvreor
(mention)
←
Latin
operator
(inherited)
→
French
opérateur
(doublet)