Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
grym
←
Proto-Celtic
*grendsmu
(inherited)
←
Proto-Indo-European
*gʰredʰ-
(inherited)
←
Latin
gradus
(cognate)
→
Welsh
grymus
(affix)