Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
shey
←
Proto-Celtic
*swexs
(inherited)
←
Irish
sé
(cognate)
←
Scottish Gaelic
sia
(cognate)
←
Proto-Indo-European
*swéḱs
(inherited)
←
Old Irish
sé
(inherited)
→
Irish
sé
(cognate)
→
Scottish Gaelic
sia
(cognate)