make-believe /(?)/

make·-be·lieve

make-believe

n.
  1. A feigning to believe, as in the play of children; a mere pretense; a fiction; an invention.
    To forswear self-delusion and make-believe.

Make-believe

a.
  1. Feigned; insincere.
  2. Imaginary; as, the child had a make-believe friend to whom he often talked.