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jigsaw (EN)
noun

noun “jigsaw”

singular jigsaw, plural jigsaws
  1. a puzzle consisting of many irregularly cut pieces that need to be assembled to form a picture
    She spent the afternoon completing a thousand-piece jigsaw.
  2. a power saw with a narrow blade that can cut curved lines in wood, metal, etc.
    The carpenter used a jigsaw to cut intricate shapes in the wood.
  3. (especially in combination with "piece") a mysterious situation
    The detective started assembling the pieces of the jigsaw.