Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
fekunda
→
Ido
fekundigar
(suffix)
→
Ido
fekundigo
(suffix)
→
Ido
fekundeso
(suffix)