Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
ручей
←
Czech
ručej
(cognate)
←
Polish
ruczaj
(cognate)
←
Proto-Slavic
*ručьjь
(inherited)
←
Ukrainian
руча́й
(cognate)