Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
gorrym
←
Proto-Celtic
*gurmos
(inherited)
←
Welsh
gwrm
(cognate)
←
Middle Irish
gorm
(inherited)
→
Manx
gorrymee
(suffix)
→
Manx
speyr-ghorrym
(compound)