Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
acumular
←
Latin
accumulāre
(borrowed)
←
Latin
accumulō
(mention)
→
Portuguese
acumulação
(suffix)
→
Portuguese
acúmulo
(back-formation)
→
Portuguese
bioacumular
(prefix)
→
Portuguese
acumulável
(affix)