Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
łęk
←
Polish
łuk
(doublet)
←
Proto-Slavic
*lǫkъ
(inherited)
→
Belarusian
лук
(cognate)
→
Polish
łuk
(doublet)
→
Polish
pałąk
(prefix)
→
Polish
łękowy
(affix)