Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Aromanian
pustilii
←
Romanian
pustiu
(cognate)
←
Proto-Slavic
*pustyni
(derived)
←
Proto-Slavic
*pustъ
(mention)