Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
gèadh
←
Proto-Celtic
*gezdā
(inherited)
←
Welsh
gŵydd
(cognate)
←
Irish
gé
(cognate)
←
Middle Irish
géd
(inherited)