Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
sàil
←
Old Irish
sál
(inherited)
→
Welsh
sawdl
(cognate)
→
Cornish
seudhel
(cognate)