Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
polarny
←
Czech
polární
(cognate)
←
Polish
polāris
(suffix)
←
Polish
ny
(suffix)
←
Russian
поля́рный
(cognate)