Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
cleaysh
←
Proto-Celtic
*kloustā
(inherited)
←
Proto-Indo-European
*ḱlew-
(root)
←
Proto-Indo-European
*ḱlew-
(derived)
←
Old Irish
clúas
(inherited)
←
Old Irish
clúais
(mention)
→
Manx
cleayshagh
(affix)