Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
coll
←
Proto-Celtic
*koslos
(inherited)
←
Proto-Celtic
*koldom
(inherited)
←
Welsh
cyll
(cognate)
←
Old Irish
coll
(inherited)
←
Old Irish
coll
(inherited)