Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
melhorar
←
Latin
meliōrō
(mention)
←
Latin
melior
(inherited)
←
Old Portuguese
mellorar
(inherited)
→
Portuguese
medrar
(doublet)
→
Portuguese
melhora
(back-formation)
→
Portuguese
se melhorar, estraga
(mention)