Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
rijo
←
Latin
rigidus
(derived)
←
Latin
rigeō
(mention)
→
Galician
rixo
(cognate)
→
Galician
rexo
(cognate)