Synonyms to between the lines

cryptic, abstruse, arcane, cabalistic, cabbalistic, censored, classified, close, closed, concealed, covert, dark, delitescent, dormant, enigmatic, equivocal, esoteric, evasive, hermetic, hibernating, hidden, hush-hush, incomprehensible, inexplicable, inscrutable, latent, lurking, muffled, murky, mysterious, mystic, mystical, mystifying, nebulous, obfuscated, obscure, obscured, occult, opaque, perplexing, possible, potential, puzzling, recondite, restricted, riddling, secret, secretive, sleeping, smothered, sphinxlike, stifled, strange, submerged, suppressed, tenebrous, top secret, ulterior, unbreatheable, unclear, under security, under the surface, under wraps, underlying, undisclosable, undisclosed, undivulgable, undivulged, unfathomable, uninformative, unmanifested, unrevealable, unrevealed, unspoken, untellable, untold, unutterable, unuttered, unwhisperable, vague, veiled, virtual, armored, beamless, beclouded, bedazzled, beyond one, black, black as night, blind, blindfold, blindfolded, buried, caliginous, cased, ceiled, cloaked, clouded, coat