Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
paćkać
←
Russian
па́чкать
(cognate)
→
Polish
spaćkać
(prefix)
→
Russian
пачкать
(cognate)