- To fail in distinctness or regularity of exercise; said of the mind or of thought.
- To hesitate in purpose or action.
- (transitive, intransitive) To stammer; to utter with hesitation, or in a weak and trembling manner.
- (figuratively) To lose faith or vigor; to doubt or abandon (a cause).
- To waver or be unsteady.
- To stumble.
- To cleanse or sift, as barley.