Synonyms for Impenetrable:

• adj.

  •adamant (adjective)
  • in-destructible,
  • unbreakable,
  • flinty,
  • more rock hard,
  • indestructible,
  • more rock-hard,
  • most rock hard,
  • most rockhard,
  • rockhard,
  • un breakable,
  • most rock-hard,
  • more rockhard,
  • rock hard,
  • in destructible,
  • un-breakable.
  •airtight (adjective)
  • most shut,
  • more shut.
  •all (adjective)
  • impenetrable.
  •arcane (adjective)
  • most unknowable,
  • un knowable,
  • more unknowable,
  • un-knowable.
  •close (adjective)
  • neck and neck,
  • close-grained.
  •compact (adjective)
  • most bunched,
  • more appressed,
  • most compressed,
  • most appressed,
  • more compressed,
  • more bunched.
  •complex (adjective)
  • tangled,
  • meandering,
  • mazy,
  • inter-woven,
  • paradoxical,
  • round-about,
  • puzzling,
  • knotted.
  •complicated (adjective)
  • convoluted.
  •dense (adjective)
  • inviolable,
  • bulletproof,
  • hard,
  • hermetic,
  • close-knit,
  • massed,
  • packed like sardines,
  • impermeable,
  • unpiercable,
  • substantial.
  •firm (adjective)
  • more congealed,
  • most congealed,
  • more fine-grained,
  • more jelled,
  • in-elastic,
  • most fine grained,
  • most fine-grained,
  • un-yielding,
  • more nonporous,
  • non-porous,
  • fine grained,
  • more fine grained,
  • finegrained,
  • in elastic,
  • most finegrained,
  • more concrete,
  • most solidified,
  • un yielding,
  • non porous,
  • most nonporous,
  • more solidified,
  • most jelled,
  • more finegrained.
  •hard (adjective)
  • hard-bitten,
  • harder.
  •hard-bitten (adjective)
  • hardhanded,
  • hard as nails,
  • Hard-handed,
  • hardbitten.
  •hardened (adjective)
  • Casehardened,
  • Unrepenting,
  • case-hardened,
  • coldhearted,
  • hard-as-nails,
  • unsubmissive,
  • irreverent,
  • unashamed,
  • hardboiled.
  •impassable (adjective)
  • more pathless,
  • more trackless,
  • more blockaded,
  • most trackless,
  • most pathless,
  • most untrodden,
  • more untrodden,
  • pathless,
  • blockaded,
  • in surmountable,
  • un-trodden,
  • in-surmountable,
  • trackless,
  • un trodden,
  • untrodden,
  • most blockaded.
  •impervious (adjective)
  • most watertight,
  • most unreceptive,
  • un-receptive,
  • most imperviable,
  • more unreceptive,
  • un pierceable,
  • more imperviable,
  • un receptive,
  • more watertight,
  • un-approachable,
  • more unpierceable,
  • un-pierceable,
  • unapproachable,
  • un approachable,
  • most unpierceable,
  • un-moved,
  • un affected.
  •incomprehensible (adjective)
  • incognizable,
  • delphic,
  • over head,
  • enigmatic,
  • indiscernible,
  • sibylline,
  • dark,
  • clear as mud,
  • fathomless,
  • beats me,
  • baffling,
  • inexplicable,
  • cabalistic,
  • beyond comprehension,
  • mystic,
  • ungraspable,
  • beyond one's grasp,
  • beyond grasp.
  •incompressible (adjective)
  • in-compressible,
  • in compressible.
  •indivisible (adjective)
  • in separable,
  • in-divisible,
  • in divisible,
  • in-separable.
  •inscrutable (adjective)
  • un discoverable,
  • most undiscoverable,
  • more sphinxlike,
  • un-discoverable,
  • more mysterial,
  • un explainable,
  • poker faced,
  • un-readable,
  • un-explainable,
  • most sphinxlike,
  • more poker faced,
  • most mysterial,
  • more poker-faced,
  • un readable,
  • in explicable,
  • in scrutable,
  • most poker-faced,
  • in-explicable,
  • more undiscoverable,
  • most poker faced,
  • in-scrutable.
  •insoluble (adjective)
  • Irresolvable,
  • unconcluded,
  • unsolved.
  •invulnerable (adjective)
  • invincible,
  • formidable,
  • unbeatable,
  • untouchable,
  • immune.
  •murky (adjective)
  • more nubilous,
  • most nubilous,
  • dusk,
  • un cleaner,
  • over cast,
  • mis tier,
  • un clean,
  • un cleanest,
  • duner,
  • over-cast,
  • un-cleanest,
  • dusker,
  • most glowering,
  • duskest,
  • more glowering,
  • mis-tier,
  • dunest,
  • more darkened,
  • un-cleaner,
  • most darkened.
  •mysterious (adjective)
  • un cannier,
  • most necromantic,
  • un-natural,
  • most alchemistic,
  • more necromantic,
  • un known,
  • more alchemistic,
  • un-cannier,
  • more transcendental,
  • un-canniest,
  • more astrological,
  • un-known,
  • magical,
  • un canny,
  • most astrological,
  • un-canny,
  • un canniest.
  •mystic (adjective)
  • more witchlike,
  • most witchlike,
  • witchlike.
  •mystic/mystical (adjective)
  • more sorcerous,
  • more magic,
  • meta physical,
  • more telestic,
  • meta-physical,
  • more wizardly,
  • most sorcerous,
  • most wizardly,
  • non-rational,
  • para normal,
  • most telestic,
  • most nonrational,
  • non rational,
  • more nonrational,
  • para-normal.
  •mystifying (adjective)
  • mystifying.
  •neck and neck (adjective)
  • nip tuck,
  • neck neck.
  •obscure (adjective)
  • in-distinct,
  • in credible,
  • in-definite,
  • un believable,
  • in-decisive,
  • in determinate,
  • un-believable,
  • in distinct,
  • in decisive,
  • in-credible,
  • farout,
  • un-defined,
  • un defined,
  • in definite.
  •opaque (adjective)
  • nontransparent,
  • unclear,
  • opaque,
  • vague,
  • non-translucent,
  • non-transparent,
  • Fuliginous,
  • lusterless,
  • cloudy,
  • hazy,
  • nontranslucent,
  • muddied.
  •Other relevant words: (adjective)
  • nonporous,
  • inscrutable,
  • thick,
  • firm,
  • perplexing,
  • invulnerable,
  • unrevealed,
  • obscure,
  • unknowable,
  • undiscoverable,
  • necromantic,
  • dense,
  • supranatural,
  • mysterious,
  • closed to,
  • incomprehensible,
  • incompressible,
  • unfathomable,
  • compact,
  • Superphysical,
  • sphinxlike,
  • poker-faced,
  • watertight,
  • dun,
  • tight,
  • imperviable,
  • arcane,
  • supernatural,
  • nonrational,
  • Unpierceable,
  • appressed,
  • astrological,
  • unintelligible,
  • extrasensory,
  • impregnable,
  • insoluble,
  • superordinary,
  • beyond one,
  • airtight,
  • murky,
  • alchemistic,
  • rock-hard,
  • unreceptive,
  • fine-grained,
  • Mysterial,
  • Supermundane,
  • sealed,
  • mind-bending,
  • enigmatical,
  • unseen,
  • Telestic,
  • unaccountable,
  • indivisible,
  • close,
  • complex,
  • impervious,
  • wizardly,
  • hardened,
  • sorcerous,
  • Nubilous.
  •perplexing (adjective)
  • more mind bending,
  • mindbending,
  • mind bending,
  • more disconcerting,
  • more mind-bending,
  • most mind-bending,
  • most mind bending,
  • more mindbending,
  • dis concerting,
  • dis-concerting,
  • most mindbending,
  • most disconcerting.
  •supernatural (adjective)
  • super mundane,
  • in-visible,
  • more supermundane,
  • super natural,
  • un earthliest,
  • super-human,
  • un-revealed,
  • more unrevealed,
  • more phantom,
  • super human,
  • superhuman,
  • fairiest,
  • un-earthly,
  • in visible,
  • un earthly,
  • super ordinary,
  • super-natural,
  • super-mundane,
  • most supranatural,
  • super-ordinary,
  • un-usual,
  • most superordinary,
  • more supranatural,
  • un usual,
  • most phantom,
  • more superordinary,
  • un-earthliest,
  • un-earthlier,
  • un earthlier,
  • fairier,
  • most supermundane,
  • un revealed,
  • supra-natural,
  • most unrevealed,
  • supra natural.
  •superphysical (adjective)
  • extra-sensory,
  • extra mundane,
  • more extrasensory,
  • super physical,
  • most extrasensory,
  • super-physical,
  • extra sensory,
  • extra-mundane.
  •supersensible (adjective)
  • super sensible,
  • super-sensible,
  • Supersensible.
  •thick (adjective)
  • jellied,
  • crawling with,
  • gelatinous,
  • ropy,
  • ropiest,
  • syrupy,
  • Caked,
  • GUNKY,
  • clabbered,
  • gloppy,
  • Gummous,
  • vitrified,
  • ropier,
  • curdled,
  • like sardines.
  •tight (adjective)
  • hermetically sealed,
  • Slammed,
  • stopped up,
  • proofer,
  • Padlocked,
  • skintight.
  •unaccountable (adjective)
  • extra ordinary,
  • unheard of,
  • unheard-of.
  •uncomprehensible (adjective)
  • un-comprehensible,
  • un comprehensible.
  •unfathomable (adjective)
  • too deep.
  •unintelligible (adjective)
  • unexplicit.
  •unseen (adjective)
  • unperceived,
  • curtained,
  • Shrouded,
  • not in sight,
  • unobserved.

• n.

  •
  • contorted,
  • confused,
  • difficult,
  • intricate,
  • elaborate,
  • involved,
  • confusing,
  • complicated.
  •
  • knowledge,
  • rigid,
  • inflexible,
  • stiff.
  •heavy (noun)
  • heavy.
  •impenetrable (noun)
  • uncomprehensible.
  •not cultivated (noun)
  • wilder.
  •Other relevant words: (noun)
  • state,
  • characteristic.

• v.

  •closed (verb)
  • impassable.

• Other synonyms:

  •
  • erectile,
  • stiffly,
  • deep.
  •
  • solidity,
  • unyielding,
  • packed,
  • permanent,
  • hidden,
  • rock-solid,
  • wild.
  •
  • erect.
  •
  • solid.
  •
  • set.
  •illegible
  • undecipherable.
  •unobtainable
  • inaccessible.

Paraphrases for Impenetrable:

• Equivalence

  • Adjective
    incomprehensible.

• Independent

  • Adjective
    inconceivable, obscure, inexplicable.

• Other Related

  • Adjective
    inscrutable, unintelligible, unfathomable, opaque, impassable, inaudible, mysterious, insurmountable, non-transparent.

Antonyms for Impenetrable:

• adj.

  • all
    penetrable.
  • dense
    porous, thin, comprehensible, intelligible, understandable, permeable, clear, open, soft.
  • incomprehensible
    known, explainable, obvious, plain, explicable.
  • Other antonyms:
    fundamental, fathomable, unambiguous, organized, easy, elemental, bendable, essential, giving, squishy, systematized, comprehendible, unsealed, convincing, connected, absorbent, open-and-shut, rudimentary, underlying, perspicuous, unequivocal, flexible, malleable, systematic, lucid, cogent, basic, coherent, straightforward, elementary, manifest, transparent, ordered, pellucid, leaky, elastic, simple, orderly, unmistakable, negotiable, yielding, pliable, compelling, apparent.