Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
cuirr
←
Proto-Indo-European
*(s)ker-
(root)
←
Middle Irish
cuirid
(inherited)
←
Old Irish
·cuirethar
(inherited)
←
Old Irish
fo·ceird
(mention)
→
Manx
aachuirr
(prefix)