A grammatical form (often a verb form) that is used in a conditional expression to refer to an event, transaction, occurrence, or object that is hypothetical and often counterfactual.
A grammatical form (often a verb form) that refers to an event, transaction, occurrence, or object that happened (or had happened), or existed, at some time before now (the applicable reference time).
An instance or cause of such a feeling.
A strong feeling of anxiety.
A person who causes worry.
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.