Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*ostь
→
Bulgarian
острица
(derived)
→
Old Church Slavonic
старость
(suffix)
→
Lithuanian
akstis
(cognate)
→
Polish
ość
(inherited)
→
Russian
старость
(suffix)
→
Russian
ость
(inherited)