Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Kashubian
rujan
←
Bulgarian
[[руен]]
(cognate)
←
Czech
[[říjen]]
(cognate)
←
Serbo-Croatian
[[rujan]]
(borrowed)