Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lithuanian
tuščias
←
Proto-Balto-Slavic
*tuskjas
(inherited)
→
Estonian
tühi
(cognate)
→
Finnish
tyhjä
(cognate)