Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
свиде́тель
→
Bulgarian
свидетел
(borrowed)
→
Russian
свидетельство
(affix)
→
Russian
свидетельница
(suffix)
→
Russian
свидетельский
(affix)