Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
existar
←
Esperanto
ekzisti
(derived)
←
Spanish
existir
(derived)
←
French
exister
(derived)
←
Latin
exsistō
(derived)
→
Ido
existeskar
(suffix)