Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
diog
←
Welsh
di
(prefix)
←
Welsh
awg
(prefix)
←
Proto-Indo-European
*h₁eḱ-
(derived)
←
Middle Welsh
diawc
(inherited)