Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
ass
←
Proto-Celtic
*exs
(inherited)
←
Irish
as
(cognate)
←
Proto-Indo-European
*h₁eǵʰs
(inherited)
←
Old Irish
ass
(inherited)
←
Old Irish
a/Old Irish
(mention)
→
French
à
(cognate)