Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
talho
←
Spanish
tajo
(cognate)
←
Galician
tallo
(cognate)
←
Portuguese
talhar
(back-formation)
→
Galician
tallo
(cognate)