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  What it means

  Literally “like in a bank,” this idiom means something is absolutely certain, guaranteed, or as safe as money locked in a vault. It expresses total confidence that something will happen or is true. To jest jak w banku means “That’s a sure thing.” Poles use it to reassure someone or to assert their own certainty about an outcome. Wygramy — jak w banku means “We’ll win — bank on it.”

  Vocabulary

  • jak — like, as (comparative conjunction)
  • w — in (preposition taking the locative case)
  • banku — in the bank (locative singular of bank)
  • bank — bank

  Grammar note

  The preposition w (in/at) requires the locative case: bank → banku. This is a regular masculine noun following standard locative singular patterns (-k → -ku). The phrase functions as a predicate: To jest jak w banku (This is as certain as money in a bank). It can also precede a clause: Jak w banku, że przyjdzie — 'It's guaranteed he'll come.'

  Cultural context

  This is a casual, universally understood expression used in everyday informal speech. The comparison to a bank reflects the cultural association of banks with security and reliability. It is common across generations and regions. The closest English equivalents are 'you can bank on it,' 'it's a sure thing,' or 'it's in the bag.'

  Beginner

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