Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
gáir
←
Gaulish
Garomarus
(mention)
←
Proto-Celtic
*gāris
(inherited)
←
Irish
gair
(mention)
←
Proto-Indo-European
*ǵeh₂r-
(root)
←
Proto-Indo-European
*ǵeh₂r-
(inherited)
←
Old Irish
gáir
(inherited)
←
Old Irish
gáirid
(inherited)
←
Middle Welsh
gawr
(cognate)
→
Irish
lúcháir
(affix)