Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
tatxa
←
Occitan
tacha
(borrowed)
→
Catalan
tatxó
(affix)
→
Catalan
tatxot
(affix)