Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cé
←
Gaulish
cagiíum
(derived)
←
Proto-Celtic
*kʷēs
(inherited)
←
Proto-Celtic
*kagyom
(derived)
←
Welsh
pwy
(cognate)
←
Welsh
cae
(cognate)
←
French
quai
(cognate)
←
Irish
cia
(link)
←
Irish
cén
(link)
←
Irish
cé na
(link)
←
Irish
cé acu
(link)
←
Irish
cér
(link)
←
Irish
cérb
(link)
←
Irish
cér
(link)
←
Irish
cérbh
(link)
←
Irish
cé gur
(link)
←
Irish
cé nach
(link)
←
Irish
cé nár
(link)
←
Irish
céadh
(link)
←
Irish
céibh
(link)
←
Irish
céidh
(link)
←
Proto-Indo-European
*kʷis
(inherited)
←
Old Irish
cía
(inherited)
←
Old Irish
cía
(inherited)
→
Irish
cén
(mention)
→
Irish
cér
(mention)
→
Irish
céard
(mention)
→
Irish
cé acu
(compound)
→
Scottish Gaelic
ge
(cognate)