Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
cloc
←
Proto-Celtic
*klokkos
(inherited)
←
Old Irish
cloc
(inherited)
→
Irish
clogad
(mention)
→
Middle Irish
clocán
(suffix)
→
Middle Irish
clocach
(affix)