Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
szeptać
←
Proto-Slavic
*šьpъtati
(inherited)
→
Polish
Szeptuch
(suffix)
→
Polish
szeptun
(suffix)
→
Polish
szepnąć
(suffix)
→
Russian
шептать
(cognate)
→
Ukrainian
шептати
(cognate)