Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
dhone
←
Proto-Celtic
*dusnos
(inherited)
←
Old Irish
donn
(inherited)
→
Manx
cro-ghone
(compound)
→
Manx
breck-ghone
(compound)