Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Esperanto
regi
→
Esperanto
registaro
(affix)
→
Esperanto
regebla
(affix)
→
Esperanto
ekregi
(affix)