stumble (EN)
verb, noun

verb “stumble”

stumble; he stumbles; past stumbled, part. stumbled; ger. stumbling
  1. to trip slightly while walking or running, which might cause you to fall
    She stumbled on the uneven sidewalk and almost fell.
  2. to speak in a hesitant way, often making errors or pausing unexpectedly
    During his presentation, he stumbled and forgot what he was going to say next.
  3. to move in a way that is not smooth or steady, often nearly falling
    Sarah stumbled over the uneven sidewalk, nearly dropping her groceries.
  4. to make someone else trip or almost fall
    The unexpected news stumbled him, making him lose his balance.
  5. to cause someone to make a mistake or to get confused
    The confusing instructions stumbled the students, making them unsure of what to do next.
  6. to find or encounter something or someone by chance
    While exploring the old attic, Sarah stumbled upon a box of her grandmother's letters.

noun “stumble”

sg. stumble, pl. stumbles
  1. a minor fall or slip while walking or running
    She had a little stumble on the uneven sidewalk but quickly caught herself.
  2. a small problem or mistake that happens while trying to achieve something
    Despite a few stumbles in the beginning, the team eventually launched a successful product.