Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
cinco
←
Latin
*cīnque
(inherited)
←
Latin
quīnque
(inherited)
←
Old Portuguese
cinco
(inherited)
←
Old Portuguese
cinquo
(mention)
←
Old Portuguese
cinque
(mention)