Answer: impossible

AnswerCrossword Clue
IMPOSSIBLEWord scorned by a real optimist.
IMPOSSIBLE"It's ...," Perry Como hit
IMPOSSIBLE"The ... Dream," 1965 song
IMPOSSIBLEAnything's belief?
IMPOSSIBLEOut of the question
IMPOSSIBLEQ: Are you eligible for this job? A: Yes. ...
impossibleNot able to occur, exist, or be done
impossible(of a person) Very unreasonable
impossibleVery difficult to deal with
impossiblea thing that is not possible