Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
letro
←
English
letter
(borrowed)
←
Esperanto
letero
(borrowed)
←
French
lettre
(borrowed)
←
Ido
litero
(doublet)
←
Italian
lettera
(borrowed)
→
Ido
litero
(doublet)