Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
trzęsawisko
←
Bulgarian
тресавище
(cognate)
←
Polish
trząść
(suffix)
←
Polish
isko
(suffix)
→
Bulgarian
тресавище
(cognate)