Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
broc
←
Proto-Celtic
*brokkos
(inherited)
←
Welsh
broch
(cognate)
←
Middle Irish
brocc
(inherited)
→
Scottish Gaelic
broc
(cognate)