Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
păstrăv
←
Bulgarian
пъстъ́рва
(borrowed)
←
Romanian
pestriț
(doublet)
←
Proto-Slavic
*pьstrъ
(derived)
→
Romanian
păstrăvior
(suffix)
→
Romanian
păstrăvar
(suffix)
→
Romanian
pestriț
(doublet)
→
Romanian
păstrăvărie
(suffix)
→
Romanian
păstrăviță
(suffix)
→
Romanian
Păstrăveni
(mention)
→
Romanian
Păstrăv
(mention)