Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
teatro
←
German
Theater
(derived)
←
English
theatre
(derived)
←
Esperanto
teatro
(derived)
←
French
théâtre
(derived)
←
Ancient Greek
θέατρον
(derived)
←
Italian
teatro
(derived)
←
Latin
theātrum
(derived)
←
Russian
теа́тр
(derived)
→
Ido
teatrala
(affix)
→
Ido
operoteatro
(compound)