Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
cec
←
Spanish
ciego
(cognate)
←
Proto-Indo-European
*káykos
(inherited)
←
Proto-Italic
*kaikos
(inherited)
←
Latin
caecus
(inherited)
←
Occitan
cec
(cognate)
→
Catalan
cegament
(suffix)
→
Catalan
ceguesa
(suffix)
→
Catalan
sordcec
(compound)