Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
istnieć
→
Polish
samoistny
(affix)
→
Polish
zaistnieć
(affix)
→
Polish
współistnieć
(prefix)
→
Ukrainian
існувати
(cognate)