Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Aromanian
fucos
←
Romanian
focos
(cognate)
←
Aromanian
foc
(suffix)
←
Aromanian
os
(suffix)
→
Romanian
focos
(cognate)