Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
allt
←
Breton
aot
(cognate)
←
Irish
alt
(cognate)
←
Cornish
als
(cognate)
←
Old Irish
alt
(inherited)
→
Scottish Gaelic
alltan
(suffix)