Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
beko
←
Gaulish
*bekkos
(derived)
←
Proto-Celtic
*bekkos
(derived)
←
Latin
beccus
(derived)
→
Ido
bekagar
(suffix)