Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Esperanto
aerkastelo
←
Danish
luftkastel
(cognate)
←
German
Luftschloss
(cognate)
←
Esperanto
aero
(affix)
←
Esperanto
kastelo
(affix)
←
Dutch
luchtkasteel
(cognate)