Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
pégaro
←
Proto-Indo-European
*peyḱ-
(root)
←
Proto-Indo-European
*peyḱ-
(derived)
←
Proto-Slavic
*pь̀strъ
(cognate)
→
Galician
apigarado
(affix)