Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
greddf
←
Proto-Celtic
*wridmā
(inherited)
←
Proto-Indo-European
*wréh₂ds
(inherited)
←
Old Irish
frém
(cognate)
←
Middle Welsh
greðyf
(inherited)
→
Old Irish
frém
(cognate)