Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
luí
←
Proto-Celtic
*legyom
(inherited)
←
Proto-Indo-European
*legʰ-
(derived)
←
Old Irish
lige
(inherited)
→
Irish
foluí
(affix)
→
Irish
tromluí
(affix)