Synonyms:
- arcane,
- cabalistic,
- censored,
- classified,
- close,
- closed,
- concealed,
- cryptic,
- dark,
- enigmatic,
- esoteric,
- hermetic,
- hidden,
- hinted,
- hush-hush,
- implicit,
- implied,
- inferred,
- intimated,
- latent,
- mute,
- mysterious,
- occult,
- restricted,
- secret,
- silent,
- smothered,
- stifled,
- suggested,
- suppressed,
- tacit,
- top secret,
- ulterior,
- unbreatheable,
- undeclared,
- under security,
- under wraps,
- understood,
- undisclosable,
- undisclosed,
- undivulgable,
- undivulged,
- unexpressed,
- unmentioned,
- unproclaimed,
- unpronounced,
- unpublished,
- unrecorded,
- unrevealable,
- unrevealed,
- unsaid,
- unstated,
- unsung,
- untalked-of,
- untellable,
- untold,
- unutterable,
- unuttered,
- unvoiced,
- unwhisperable,
- unwritten,
- wordless