Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
ex-
→
Catalan
es-
(doublet)
→
Catalan
expresident
(affix)
→
Catalan
excandidat
(affix)
→
Catalan
exsenador
(affix)
→
Catalan
exjugador
(affix)
→
Catalan
exmarit
(affix)