Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
klefo
←
French
clef
(borrowed)
←
French
clé
(mention)
←
Ido
klavo
(mention)
←
Latin
clavis
(derived)
→
Ido
klavo
(mention)
→
Ido
klefagar
(suffix)