Stumble

1. To fall into a crime or an error; to err.
2. Fig.: To mislead; to confound; to perplex; to cause to err or to fall.
3. A trip in walking or running.
4. To cause to stumble or trip.
5. To trip in walking or in moving in any way with the legs; to strike the foot so as to fall, or to endanger a fall; to stagger because of a false step.
6. To walk in an unsteady or clumsy manner.
7. To strike or happen (upon a person or thing) without design; to fall or light by chance; -- with on, upon, or against.
8. A blunder; a failure; a fall from rectitude.