verb
(intransitive) To be troubled; to give way to mental anxiety or doubt.
(transitive) Disturb the peace of mind of; afflict with mental agitation or distress; to exercise.
(transitive) To harass; to irritate or distress.
(transitive) To seize or shake by the throat, especially of a dog or wolf.
(transitive) To touch repeatedly; to fiddle with.
(transitive, obsolete, Scotland) To strangle.
noun
A strong feeling of anxiety.
An instance or cause of such a feeling.
A person who causes worry.