Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Hungarian
szajkó
←
Russian
сойка
(cognate)
←
Serbo-Croatian
sojka
(cognate)
←
Slovak
sojka
(cognate)
→
Hungarian
szajkók
(affix)