Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
eythin
←
Proto-Celtic
*akstīnā
(inherited)
←
Proto-Celtic
*akstīno-
(mention)
←
Proto-Indo-European
*h₂eḱ-stí-
(inherited)
←
Proto-Indo-European
*h₂eḱ-
(mention)
→
Latin
opulus
(cognate)