stumbles

/S T AH1 M B AH0 L Z/
noun
  1. 1

    A fall, trip or substantial misstep.

  2. 2

    An error or blunder.

  3. 3

    A clumsy walk.

verb
  1. 1

    To trip or fall; to walk clumsily.

    โ€œHe stumbled over a rock.โ€

  2. 2

    To make a mistake or have trouble.

    โ€œI always stumble over verbs in Spanish.โ€

  3. 3

    To cause to stumble or trip.

  4. 4

    To mislead; to confound; to cause to err or to fall.

  5. 5

    To strike or happen (upon a person or thing) without design; to fall or light by chance; with on, upon, or against.

Source: https://en.wiktionary.org/wiki/stumble, https://en.wiktionary.org/wiki/stumbles