Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
festiu
←
Catalan
festa
(suffix)
←
Catalan
iu
(suffix)
←
Latin
fēstīvus
(derived)
→
Catalan
festivament
(affix)