Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*mantī
→
Welsh
maint
(inherited)
→
French
maint
(derived)
→
Old French
maint
(derived)
→
Old Irish
méit
(inherited)