Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
zâmbi
←
Bulgarian
[[зъбя]] се
(cognate)
←
Proto-Slavic
*zǫbъ
(derived)
→
Romanian
zâmbet
(suffix)
→
Romanian
zâmbitură
(suffix)
→
Romanian
zâmbire
(suffix)
→
Romanian
zâmbitor
(suffix)
→
Romanian
zâmbăreț
(suffix)