Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
ronda
←
Esperanto
ronda
(borrowed)
←
French
rond
(derived)
←
Latin
rotundus
(derived)
→
Ido
rondigar
(suffix)