Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
châtrer
←
French
castrer
(doublet)
←
Old French
chastrer
(inherited)
←
Latin
castrāre
(inherited)
←
Latin
castrō
(mention)
→
French
castrer
(doublet)
→
French
châtreur
(suffix)