Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lithuanian
šeši
←
Proto-Balto-Slavic
*šéš
(inherited)
←
Proto-Indo-European
*swéḱs
(inherited)
→
Persian
شش
(cognate)
→
Latgalian
seši
(cognate)