1. (a.) Not told; not related; not revealed; as, untold secrets.

2. (a.) Not numbered or counted; as, untold money.

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unimaginable universal unlimited unmeasurable unmeasured unmentioned unnumbered unplumbed unproclaimed unpronounced unpublished unrecorded unreported unrevealable unrevealed unsaid unsettled unspeakable unspoken unsung untalked-of untellable unthinkable unutterable unuttered unvoiced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