Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old French
vint
←
Latin
vīgintī
(inherited)
→
French
vingt
(inherited)
→
Norman
vingt
(inherited)
→
Norman
vîngt
(inherited)
→
Walloon
vint
(inherited)