Untold1. (a.) Not told; not related; not revealed; as, untold secrets.
2. (a.) Not numbered or counted; as, untold money.
Thesaurus Entries
all-comprehensive, all-inclusive, arcane, at issue, boundless, cabalistic, censored, classified, close, closed, concealed, conditional, conditioned, contingent, countless, cryptic, dark, dependent, depending, endless, enigmatic, enormous, esoteric, eternal, exhaustless, extending everywhere, gigantic, hermetic, hidden, hush-hush, illimitable, illimited, immeasurable, immense, in question, in suspense, in the balance, incalculable, incomprehensible, inconceivable, indescribable, inexhaustible, inexpressible, infinite, infinitely continuous, innumerable, interminable, interminate, latent, limitless, mammoth, measureless, mighty, monstrous, myriad, mysterious, no end of, numberless, occult, open, pendent, pending, perpetual, private, prodigious, restricted, secret, shoreless, silent, smothered, stifled, sumless, suppressed, suspenseful, termless, titanic, top secret, ulterior, unbounded, unbreatheable, uncircumscribed, uncountable, uncounted, undecided, undeclared, under security, under wraps, undetermined, undisclosable, undisclosed, undivulgable, undivulged, unestablished, unexpressed, unfathomable, unfixed, unimaginable, universal, unlimited, unmeasurable, unmeasured, unmentioned, unnumbered, unplumbed, unproclaimed, unpronounced, unpublished, unrecorded, unreported, unrevealable, unrevealed, unsaid, unsettled, unspeakable, unspoken, unsung, untalked-of, untellable, unthinkable, unutterable, unuttered, unvoiced, unwhisperable, unwritten, up for grabs, vast, without bound, without end, without limit, without measure, without number, wordless