What is the definition of the word unhappiness?

Does Ecstasy cause decrease in intelligence scores? What user should be alert and report all following except one? Do midgets have short attention spans? What is anthropocentric development? What are the differences between an interview and a questionnair? What type of psychologist examine the differences between automatic and controlled processes in thinking? What is the difference between values and attitude? Why was it bad for the winners and the losers? Why would a guy constantly stare at a girl and walk past her a few times in class everyday regularly even though she doesn't stare back when he knows she stared long time ago? What are environmental factors for today's management to study organizational behavior? How do you define 'fear'? What are the factors that influence motivation? Why are men so easy to accuse women of cheating when they are the ones doing it? Which sciences uses envaromental education to make people understand their behaviour in the envaroment? What physical problem did Walter Dean Myers have as a young man? Piaget was convinced that the mind of a child? The usual tendency with negative feedback is to find the reason to explain one's own behavior this tendency is termed as? Which type of research would an investigator manipulate one factor in order to observe its effect on some behavior or mental process? What is 'reflective behaviour'? What is prior parameter v.s. post hoc parameter?

What is the definition of the word unhappiness?