cryptic (adj.)
- abstruse
- arcane
- cabalistic
- censored
- classified
- close
- closed
- concealed
- covert
- dark
- dormant
- enigmatic
- equivocal
- esoteric
- evasive
- hermetic
- hibernating
- hidden
- hush-hush
- incomprehensible
- inexplicable
- inscrutable
- latent
- muffled
- murky
- mysterious
- mystic
- mystical
- mystifying
- nebulous
- obscure
- occult
- opaque
- perplexing
- possible
- potential
- puzzling
- recondite
- restricted
- secret
- secretive
- sleeping
- smothered
- stifled
- strange
- submerged
- suppressed
- tenebrous
- ulterior
- unclear
- underlying
- undisclosed
- unfathomable
- uninformative
- unrevealed
- unspoken
- untellable
- untold
- unutterable
- unuttered
- vague
- veiled
- virtual
