Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
treabă
←
Bulgarian
трябва
(cognate)
←
Old Church Slavonic
трѣба
(cognate)
←
Serbo-Croatian
treba
(cognate)
←
Proto-Slavic
*trěba
(derived)
←
Proto-Slavic
*terba
(derived)
→
Romanian
întreba
(mention)
→
Romanian
întreba
(mention)
→
Romanian
trebușoară
(suffix)
→
Romanian
Treabă
(mention)