A very bad or frightening dream.
Any bad, miserable, difficult or terrifying situation or experience that arouses anxiety, terror, agony or great displeasure.
A feeling of extreme anxiety or suffocation experienced during sleep; Sleep paralysis.
To have a nightmare.
A moment of almost pleasurable fear; a frisson.
A shivering tremor, often from fear or horror.
To vibrate jerkily.
To shake nervously, often from fear or horror.