Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Esperanto
sia
←
Belarusian
свой
(cognate)
←
German
sein
(cognate)
←
Esperanto
si
(suffix)
←
Esperanto
a
(suffix)
←
Polish
swój
(cognate)
←
Russian
свой
(cognate)
→
Esperanto
siatempe
(affix)