Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
oddf
←
Proto-Celtic
*odbos
(inherited)
←
Proto-Indo-European
*h₃ésth₁
(derived)
←
Proto-Indo-European
*h₂óst
(mention)
←
Old Irish
odb
(cognate)
→
Irish
fadhb
(cognate)
→
Old Irish
odb
(cognate)