Unrealistic (adjective)

  1. Not having a basis in reality or fact.
  2. Not achievable or appropriate to the circumstances.
  3. Exaggerated or foolishly optimistic.

Origin:

Mid 19th century: from un-1 (expressing negation) + realistic.

Examples:

  1. Her expectations of a perfect marriage were unrealistic.
  2. The deadline was unrealistic given the amount of work that needed to be done.
  3. The plan to solve all the world's problems in a single day was unrealistic.
  4. Her belief that she could win the race without training was unrealistic.
  5. The company's revenue projections were considered unrealistic by industry analysts.
Some random words: improviser, subservient, cynosure