Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
caarjyn
←
Irish
cairde
(cognate)
←
Scottish Gaelic
càirdean
(cognate)
→
Irish
cairde
(cognate)
→
Scottish Gaelic
càirdean
(cognate)
→
Manx
aachaarjee
(confix)