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. impenetrable(adj)

    not admitting of penetration or passage into or through

    "an impenetrable fortress"; "impenetrable rain forests"

  2. dense, heavy, impenetrable(adj)

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

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

  3. impenetrable(adj)

    impossible to understand

    "impenetrable jargon"


  1. impenetrable(Adjective)

    Not penetrable.

    The fortress is impenetrable, so it cannot be taken.

    Etymology: From impenetrabilis.

  2. impenetrable(Adjective)

    Incomprehensible; inscrutable.

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

    Etymology: From impenetrabilis.

Webster Dictionary

  1. Impenetrable(adj)

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

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

  2. Impenetrable(adj)

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

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

  3. Impenetrable(adj)

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

    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.

How to pronounce impenetrable?

  1. Alex
    US English

How to say impenetrable in sign language?


  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. C. S. Lewis:

    Love anything and your heart will be wrung and possibly broken. If you want to make sure of keeping it intact you must give it to no one, not even an animal. Wrap it carefully round with hobbies and little luxuries; avoid all entanglements. Lock it up safe in the casket or coffin of your selfishness. But in that casket--safe, dark, motionless, airless--it will change. It will not be broken; it will become unbreakable, impenetrable, irredeemable. To love is to be vulnerable.

  2. 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.

  3. Voltaire:

    There is a wide difference between speaking to deceive, and being silent to be impenetrable.

  4. 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.

  5. Hugh Cumberland:

    This image of the SWIFT network and the surrounding ecosystem being secure and impenetrable has encouraged complacency.

Images & Illustrations of impenetrable

  1. impenetrableimpenetrableimpenetrableimpenetrableimpenetrable

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Translations for impenetrable

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    a decorative musical accompaniment (often improvised) added above a basic melody
    • A. exacerbate
    • B. descant
    • C. gloat
    • D. suffuse

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