untrue; mythical; false;
a false story or idea widely believed to be true.
The earth is flat was an apocryphal belief. Everyone thought it was true.
apo - CRY - phal
remember the boy who cried wolf - a story about a lying.
We had an apocryphal faith in the product. We had to rebuild it because the quality was not good.
(c) 2016 E. Carruthers