Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
szczelny
←
Proto-Slavic
*ščelь
(inherited)
←
Proto-Slavic
*-ьnъ
(mention)
→
Polish
szczelnie
(affix)
→
Ukrainian
щільний
(cognate)