jitteriness: the anxious feeling you have when you have the jitters
an uneasy psychological state; "he suffered an attack of nerves"
a sensitive or highly strung temperament
Anxiety is a psychological and physiological state characterized by cognitive, somatic, emotional, and behavioral components.Seligman, M.E.P., Walker, E.F. & Rosenhan, D.L.). Abnormal psychology, (4th ed.) New York: W.W. Norton & Company, Inc. ...
The state or quality of being nervous
Animals showing signs of nervousness (startling, hiding etc.) are usually under some sort of stress. The most common of these is stress through poor water quality such as low dissolved oxygen concentrations.
Often a euphemism for depression, emotional, or mental disorder.
in MRP systems, nervousness describes frequent changes to planned orders for lower-level items, that result from minor changes in demand of higher-level items.