Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
esforçar
←
Latin
ex
(mention)
←
Latin
(mention)
←
Latin
fortis
(derived)
←
Old Portuguese
esforçar
(inherited)
→
Portuguese
esforço
(back-formation)