Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
obreiro
←
Latin
operārius
(derived)
←
Portuguese
operário
(doublet)
←
Old Portuguese
obreiro
(derived)
→
Portuguese
operário
(mention)