Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gorau
←
Proto-Brythonic
*gworɣʉ
(inherited)
←
Proto-Celtic
*uɸorgousom
(inherited)
←
Proto-Celtic
*uɸor-
(mention)
←
Proto-Indo-European
*ǵews-
(mention)
←
Old Irish
forgu
(cognate)