Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Corsican
dece
←
Proto-Indo-European
*déḱm̥
(inherited)
←
Italian
diece
(cognate)
←
Latin
decem
(inherited)
←
Portuguese
dez
(cognate)
→
Corsican
dicessette
(compound)
→
Corsican
diciottu
(compound)
→
Corsican
dicennove
(compound)