Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
céimm
←
Proto-Celtic
*kanxsman
(inherited)
←
Proto-Celtic
*kengeti
(mention)
←
Proto-Indo-European
*(s)keng-
(root)
→
Irish
céim
(inherited)
→
Manx
keim
(inherited)