Any bad, miserable, difficult or terrifying situation or experience that arouses anxiety, terror, agony or great displeasure.
A very bad or frightening dream.
A feeling of extreme anxiety or suffocation experienced during sleep; Sleep paralysis.
To have a nightmare.
A tendency to become irritable or angry.
Individual differences in behavior that are biologically based and are relatively independent of learning, system of values and attitudes.
A person's usual manner of thinking, behaving or reacting.
The altering of certain intervals from their correct values in order to improve the moving from key to key.