Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
автентичний
←
Belarusian
аўтэнты́чны
(cognate)
←
Polish
autentyczny
(cognate)
←
Russian
аутенти́чный
(cognate)
←
Ukrainian
authenticus
(affix)
←
Ukrainian
-ний
(affix)