One of the Big Five personality traits: Neuroticism

12345678
Across
  1. 3. swings rapid change in mood
  2. 4. a vague unpleasant emotion
  3. 5. unreliability attributable to being unstable
  4. 6. unhappy
  5. 8. emotions experienced when not in a state of well-being
Down
  1. 1. having temperamental mood
  2. 2. petulant feeling
  3. 7. a state of mental strain