Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
ciwdod
←
Proto-Brythonic
*kiwdọd
(inherited)
←
Welsh
ciwed
(doublet)
←
Latin
cīvitātem
(derived)
←
Latin
cīvitās
(mention)
←
Middle Welsh
kiwdawt
(inherited)