Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Picard
keucher
←
Old French
cauchier
(inherited)
←
Latin
calceare
(inherited)
←
Latin
calceo
(mention)
→
Picard
keuchure
(suffix)