Stumble

1. n. A blunder; a failure; a fall from rectitude.
2. v. i. 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.
3. v. i. To walk in an unsteady or clumsy manner.
4. v. i. To fall into a crime or an error; to err.
5. v. i. To strike or happen (upon a person or thing) without design; to fall or light by chance; — with on, upon, or against.
6. v. t. To cause to stumble or trip.
7. v. t. Fig.: To mislead; to confound; to perplex; to cause to err or to fall.
8. n. A trip in walking or running.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.