Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Esperanto
gaja
←
English
gay
(derived)
←
French
gai
(derived)
←
Italian
gaio
(derived)
→
Esperanto
gaje
(suffix)
→
Esperanto
malgaja
(affix)
→
Esperanto
gajeco
(affix)
→
Esperanto
malgaje
(affix)
→
Esperanto
gajega
(suffix)