Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old East Slavic
травьнъ
←
Serbo-Croatian
travanj
(cognate)
←
Proto-Slavic
*trava
(affix)
←
Proto-Slavic
*-ьnъ
(affix)
→
Belarusian
травень
(inherited)
→
Russian
травень
(inherited)
→
Ukrainian
травень
(inherited)