Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
krucumar
←
Esperanto
krucumi
(cognate)
←
Ido
kruco
(suffix)
←
Ido
-um-
(suffix)
←
Ido
-ar
(suffix)