Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Prussian
skijstan
←
Proto-Balto-Slavic
*skīstas
(inherited)
←
Proto-Indo-European
*skidtos
(inherited)
←
Lithuanian
skýstas
(cognate)
←
Latvian
šķîsts
(cognate)
←
Proto-Slavic
*čistъ
(cognate)
→
Latvian
šķīsts
(cognate)