Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
hyd
←
Proto-Celtic
*siti-
(inherited)
←
Old Welsh
hit
(inherited)
←
Middle Welsh
hyt
(inherited)
→
Welsh
cyhyd
(prefix)
→
Latin
setius
(cognate)