Pertaining to or occurring in paroxysms or sudden, recurrent episodes. The term paroxysms often describes transient episodes of abnormal involuntary movements (e.g., chorea, athetosis, dystonia, and/or ballismus) or ataxia, which is characterized by an impaired ability to coordinate voluntary movements.

Sudden onset.

Pertaining to a sudden, periodic recurrence or worsening of disease symptoms.

Recurring suddenly and abruptly.

Suddenly recurring or intensifying

Intermittent.

Of the nature of a paroxysm; characterized or accompanied by paroxysms; as, a paroxysmal pain; paroxysmal temper.

accompanied by or of the nature of paroxysms