Questions & Answers about Bar jest blisko banku.
Because blisko takes the genitive case when it is followed by a noun.
The dictionary form is bank.
After blisko, it changes to banku:
- bank = bank
- blisko banku = near the bank
This is very common in Polish:
- blisko domu = near the house
- blisko szkoły = near the school
- blisko sklepu = near the shop
So banku is not a different word; it is the correct grammatical form of bank here.
It is the genitive singular form of bank.
A native English speaker often looks for a direct equivalent of of, but in Polish the genitive has several uses, and one of them is after words like blisko.
So:
- nominative: bank
- genitive: banku
In this sentence, the nominative subject is bar, and the location phrase uses the genitive: blisko banku.