Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
airdhirc
←
Proto-Celtic
*ɸare-
(derived)
←
Proto-Celtic
*derk-
(mention)
←
Welsh
ardderchog
(cognate)
←
Proto-Indo-European
*derḱ-
(root)
←
Proto-Indo-European
*derḱ-
(derived)
←
Old Irish
airdirc
(inherited)