Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
ennegrir
←
Catalan
en-
(affix)
←
Catalan
negre
(affix)
←
Catalan
-ir
(affix)
→
Spanish
ennegrecer
(cognate)
→
Portuguese
enegrecer
(cognate)
→
Romanian
înnegri
(cognate)