Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
acostumar
←
Portuguese
a-
(affix)
←
Portuguese
costume
(affix)
←
Portuguese
-ar
(affix)
→
French
accoutumer
(cognate)
→
Portuguese
acostumado
(mention)