Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
obowiązkowy
←
Polish
obowiązek
(suffix)
←
Polish
owy
(suffix)
→
Belarusian
абавязковы
(cognate)
→
Polish
obowiązkowo
(affix)
→
Ukrainian
обов'язковий
(cognate)