Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
ciesak
←
Polish
ciosać
(suffix)
←
Polish
ak
(suffix)
←
Polish
ciosak
(doublet)
←
Proto-Slavic
*tesakъ
(inherited)
→
Polish
tasak
(doublet)
→
Polish
ciosak
(doublet)