Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
kiaull
←
Irish
ceol
(cognate)
←
Middle Irish
ceól
(inherited)
←
Old Irish
céul
(inherited)
→
Manx
cochiaull
(prefix)
→
Manx
ard-chiaull
(prefix)