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  What it means

  Literally “like thunder from a clear sky,” this expression describes something that happens completely without warning — a sudden shock or surprise that nobody expected. It is the Polish equivalent of the English “bolt from the blue” or “out of nowhere.” The image is of a thunderclap striking on a perfectly sunny day, making the event feel all the more startling. Poles use it about unexpected news, sudden decisions, or dramatic turns of events.

  Vocabulary

  • grom — thunderbolt, clap of thunder
  • jasny — clear, bright (adjective)
  • jasnego — clear (genitive, agreeing with 'nieba')
  • niebo — sky, heaven
  • nieba — sky (genitive case)

  Grammar note

  The phrase is a simile introduced by 'jak' (like/as). 'Z jasnego nieba' uses the genitive case after the preposition 'z' (from). 'Grom' is masculine nominative here acting as the subject of the implied comparison. The whole phrase functions adverbially, modifying a verb of sudden occurrence.

  Cultural context

  The idiom is stylistically neutral to slightly literary and appears in journalism, literature, and conversation. It is very close to the English 'bolt from the blue,' making it easy for English speakers to remember. Its closest single-word synonym in Polish is 'niespodziewanie' (unexpectedly), but the idiom carries far more emotional force.

  Intermediate

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