(ˌʌnrɪˈviːld) adjnot having been disclosed, divulged, revealed, etcˌunreˈvealingadjThesaurus
Adj.
1.
unrevealed - not made known undisclosedcovert - secret or hidden; not openly practiced or engaged in or shown or avowed; "covert actions by the CIA"; "covert funding for the rebels"