What does impenetrable mean?

Definitions for impenetrable
ɪmˈpɛn ɪ trə bəlim·pen·e·tra·ble

Here are all the possible meanings and translations of the word impenetrable.

Princeton's WordNet

  1. impenetrableadjective

    not admitting of penetration or passage into or through

    "an impenetrable fortress"; "impenetrable rain forests"

  2. dense, heavy, impenetrableadjective

    permitting little if any light to pass through because of denseness of matter

    "dense smoke"; "heavy fog"; "impenetrable gloom"

  3. impenetrableadjective

    impossible to understand

    "impenetrable jargon"


  1. impenetrableadjective

    Not penetrable.

    The fortress is impenetrable, so it cannot be taken.

  2. impenetrableadjective

    Incomprehensible; inscrutable.

    Business jargon makes this document impenetrable, I can't understand it.

  3. Etymology: From impenetrabilis.

Samuel Johnson's Dictionary

  1. IMPENETRABLEadjective

    Etymology: impenetrable, Fr. impenetrabilis, Lat.

    With hard'ning cold, and forming heat,
    The cyclops did their strokes repeat,
    Before th' impenetrable shield was wrought. Dryden.

    Deep into some thick covert would I run,
    Impenetrable to the stars or sun. Dryden.

    The mind frights itself with any thing reflected on in gross: things, thus offered to the mind, carry the shew of nothing but difficulty in them, and are thought to be wrapped up in impenetrable obscurity. John Locke.

    It is the most impenetrable cur
    That ever kept with men.
    ———— Let him alone;
    I'll follow him no more with bootless prayers. William Shakespeare.

    Some will never believe a proposition in divinity, if any thing can be said against it: they will be credulous in all affairs of life, but impenetrable by a sermon of the gospel. Taylor.

Webster Dictionary

  1. Impenetrableadjective

    incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield

  2. Impenetrableadjective

    having the property of preventing any other substance from occupying the same space at the same time

  3. Impenetrableadjective

    inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart

  4. Etymology: [L. impenetrabilis; pref. im- not + penetrabilis penetrable: cf. F. impntrable.]

Chambers 20th Century Dictionary

  1. Impenetrable

    im-pen′e-tra-bl, adj. incapable of being pierced: preventing another body from occupying the same space at the same time: not to be impressed in mind or heart.—n. Impenetrabil′ity, one of the essential properties of matter, implying that no two bodies can at the same time occupy the same space.—adv. Impen′etrably.

Military Dictionary and Gazetteer

  1. impenetrable

    Incapable of being penetrated or pierced, not admitting the passage of other bodies, not to be entered; as, an impenetrable shield.

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  1. Chaldean Numerology

    The numerical value of impenetrable in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of impenetrable in Pythagorean Numerology is: 3

Examples of impenetrable in a Sentence

  1. Lionel Trilling:

    In the American metaphysic, reality is always material reality, hard, resistant, unformed, impenetrable, and unpleasant.

  2. Leandra Medine:

    ... The fact that so many young people with opinions and ideas on fashion have been able to rise to the top of this industry that has historically seemed so impenetrable is really, really inspiring and motivating, you sort of see yourself in the sort of digital superstars of fashion and that's a really special sentiment to share.

  3. Blaise Pascal:

    For after all what is man in nature? A nothing in relation to infinity, all in relation to nothing, a central point between nothing and all and infinitely far from understanding either. The ends of things and their beginnings are impregnably concealed from him in an impenetrable secret. He is equally incapable of seeing the nothingness out of which he was drawn and the infinite in which he is engulfed.

  4. Georges Bataille:

    Crime is a fact of the human species, a fact of that species alone, but it is above all the secret aspect, impenetrable and hidden. Crime hides, and by far the most terrifying things are those which elude us.

  5. Albert Einstein:

    To know that what is impenetrable to us really exists, manifesting itself as the highest wisdom and the most radiant beauty, which our dull facilities can comprehend only in the most primitive forms--this knowledge, this feeling, is at the center of true religiousness. In this sense, and in this sense only, I belong to the ranks of the devoutly religious men.

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    cause to feel shame; hurt the pride of
    • A. rumpus
    • B. abase
    • C. summon
    • D. abash

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