Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ukrainian
проблематичний
←
Belarusian
праблематы́чны
(cognate)
←
Polish
problematiczny
(cognate)
←
Russian
проблемати́чный
(cognate)
←
Ukrainian
проблема́тика
(affix)
←
Ukrainian
-и́чний
(affix)