Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
ysu
←
Proto-Celtic
*essi
(derived)
←
Proto-Indo-European
*h₁ed-
(root)
←
Proto-Indo-European
*h₁ed-
(derived)
←
Old Irish
·estar
(cognate)
←
Old Irish
ithid
(mention)