Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
iolar
←
Breton
erer
(cognate)
←
Proto-Celtic
*eriros
(inherited)
←
Welsh
eryr
(cognate)
←
Irish
iolar fíréan
(link)
←
Irish
iolar hairpí
(link)
←
Irish
iolar dingearrach
(link)
←
Irish
iolar maol
(link)
←
Irish
iolar mara
(link)
←
Irish
iolar dúbailte
(link)
←
Irish
iolar na Róimhe
(link)
←
Irish
iolar tí
(link)
←
Scottish Gaelic
iolair
(cognate)
←
Proto-Indo-European
*h₃érō
(inherited)
←
Middle Irish
ilar
(inherited)
←
Old Irish
*irar
(inherited)
←
Old Irish
ilar
(inherited)
→
Scottish Gaelic
iolair
(cognate)