Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
cocad
←
Old Irish
com
(prefix)
←
Old Irish
cath
(prefix)
→
Irish
cogadh
(inherited)
→
Scottish Gaelic
cogadh
(inherited)
→
Manx
caggey
(inherited)
→
Manx
cagg
(inherited)