Something uncertain or ambiguous.
Doubt; the condition of being uncertain or without conviction.
A parameter that measures the dispersion of a range of measured values.
A person who causes worry.
A strong feeling of anxiety.
An instance or cause of such a feeling.
To harass; to irritate or distress.
To touch repeatedly, to fiddle with.
To be troubled; to give way to mental anxiety or doubt.
To seize or shake by the throat, especially of a dog or wolf.
Disturb the peace of mind of; afflict with mental agitation or distress.