Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
keyll
←
Irish
coill
(cognate)
←
Old Irish
caill
(inherited)
→
Manx
bun-cheyll
(prefix)
→
Manx
aacheyllaghey
(confix)