Nature

shore, bank

Source:*bergъProto-Slaviccertain

From an older sense 'high ground, hill', which BCS kept.

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English

shore, bank

Polish

brzeg

bʐɛk

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In all five languages

BCS script

Latin under Cyrillic

Russian
бе́регbereg
ˈbʲerʲɪkinherited
Ukrainian
бе́регbereh
ˈbɛrɛɦinherited
Polish
brzeg
bʐɛkinherited
Czech
břeh
br̝ɛxinherited
Bosnian-Croatian-Serbian
obalaобала
ˈobaladifferent word · South Slavic, of uncertain origin
The cognate brijeg (ekavian breg) means 'hill'.
English
shore, bank