Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
lañar
←
Asturian
lañar
(cognate)
←
Latin
lanio
(inherited)
←
Portuguese
lanhar
(cognate)
→
Galician
laña
(back-formation)
→
Galician
laño
(back-formation)
→
Galician
eslañar
(prefix)