Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*strumy
→
Upper Sorbian
trumjeń
(inherited)
→
Polish
strumień
(inherited)
→
Russian
струмень
(inherited)