unrevealed
/ˌʌn.rɪˈvɛld, ˌʌn.riˈvɛld/Definitions
1. adjective
not yet revealed or made known; hidden or concealed.
“The unrevealed truth about her past remained a mystery to everyone.”
2. noun
a fact or situation that has not been revealed or made known.
“The unrevealed details of the scandal shocked the public.”