Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
ésser
←
Proto-Indo-European
*h₁ésti
(inherited)
←
Proto-Italic
*ezom
(inherited)
←
Latin
sum
(inherited)
←
Old Occitan
esser
(inherited)
→
Catalan
ser
(mention)