Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
mlaștină
←
Romanian
mlacă
(doublet)
←
Proto-Slavic
*molka
(derived)
→
Romanian
mlăștiniță
(suffix)
→
Romanian
mlăștinos
(suffix)