1. stumble - Noun
2. stumble - Verb
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.
To walk in an unsteady or clumsy manner.
To fall into a crime or an error; to err.
To strike or happen (upon a person or thing) without design; to fall or light by chance; -- with on, upon, or against.
To cause to stumble or trip.
Fig.: To mislead; to confound; to perplex; to cause to err or to fall.
A trip in walking or running.
A blunder; a failure; a fall from rectitude.
Source: Webster's dictionaryThe drunk man stumbled about Source: Internet
I stumbled across a long-lost cousin last night in a restaurant Source: Internet
he recited the whole poem without a single trip Source: Internet
he arranged his robes to avoid a trip-up later Source: Internet
confusion caused his unfortunate misstep Source: Internet
She slipped up and revealed the name Source: Internet