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