Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
pesadelo
←
Spanish
pesadilla
(cognate)
←
Portuguese
pesado
(suffix)
←
Portuguese
elo
(suffix)
→
Spanish
pesadilla
(cognate)