Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
hardy
←
Czech
hrdý
(borrowed)
←
Proto-Slavic
*gъ̑rdъ
(derived)
→
Lower Sorbian
gjardy
(cognate)
→
Polish
hardość
(suffix)
→
Polish
hardo
(suffix)
→
Polish
hardzieć
(suffix)