Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
purgation
←
English
purge
(suffix)
←
English
ation
(suffix)
←
Proto-Indo-European
*pewH-
(root)
→
English
superpurgation
(prefix)