n.
  - lack of hope or confidence in the future.
 - Philosophy  a belief that this world is as bad as it could be or that evil will ultimately prevail over good.
 
 
  Derivative
  
    - pessimist n.
  - pessimistic adj.
  - pessimistically adv.
 
   
  Etymology
  C18: from L. pessimus ‘worst’, on the pattern of optimism.