Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Aromanian
arugoz
←
Romanian
rogoz
(cognate)
←
Proto-Slavic
*rogozъ
(derived)
→
Romanian
rogoz
(cognate)