0 present participle of stumble
1 to step awkwardly while walking or running and fall or begin to fall:
2 to make a mistake, such as repeating something or pausing for too long, while speaking or playing a piece of music:
One of the major stumbling blocks may be the availability of sufficient capital to fund the company's start up operations.
The phonological structure of sign is a stumbling block in their recognition of sign meaning.
Two of the ' productive sectors ', agriculture and especially the construction industry, are critically stumbling behind.
With the retreat of religious controversy from the public sphere, the crucial stumbling block for national\state-wide educational provision was removed.
Two major stumbling blocks prevent the spread of use of this new and renewable energy.
These conflicts proved to be stumbling blocks in the laborious road to a cross-border tariffication system compatible with the internal market concept.
The text is almost continuously present and is to be recited in a stumbling and searching syllabification on the same monochrome tone.
The steps are shorter and faster, and the motion looks like the model is stumbling forward.