IPA: /əˈpɒkrɪfəl.nəs/
KK: /əˈpɒkrɪfəlnəs/
The state of being of questionable authenticity or not widely accepted as true.
The apocryphalness of the story made many people doubt its validity.
Apocryphalness is formed from "apocryphal" (from Greek "apokryphos", meaning hidden or obscure) and the suffix "-ness" (meaning the state or quality of). The word refers to the quality of being apocryphal, or having a hidden or dubious authenticity.
Think of something that is 'hidden' or 'obscure' ('apocryphal') and the '-ness' indicating a state or quality. This helps you remember that 'apocryphalness' refers to the quality of being questionable or not genuine.
No commonly confused words.