Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
glen
←
Proto-Celtic
*glanos
(inherited)
←
Manx
neughlen
(link)
←
Old Irish
glan
(inherited)
←
Old Irish
glanaid
(inherited)
→
Manx
neughlen
(affix)
→
Manx
neuglen
(affix)
→
Manx
aaghlen
(prefix)