Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
reo
←
Catalan
reu
(borrowed)
←
Spanish
a reo y al reo
(link)
←
Latin
reus
(borrowed)
←
Latin
rhēdo
(derived)
←
Latin
(mention)
←
Portuguese
réu
(cognate)
→
Catalan
reu
(cognate)
→
Spanish
exreo
(affix)