Meaning & Definition of word "Impenetrable"

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    Impenetrable

    /ɪmˈpɛnɪtrəbl/

    adjective:

    • 1. Impossible to pass through or enter.
      • Example: The fortress's walls were made of impenetrable stone, keeping invaders at bay.
    • 2. Unable to be understood or comprehended; obscure.
      • Example: His explanation of the complex theory was impenetrable to the audience.
    • 3. Dense or thick, often referring to physical substances.
      • Example: The impenetrable fog covered the entire city, reducing visibility to near zero.

    Etymology

    Late Middle English, from Latin 'impenetrabilis', from 'in-' meaning 'not' + 'penetrabilis' meaning 'able to be penetrated'.

    Common Phrases and Expressions

    impenetrable logic:

    Logic that is very difficult to understand or follow.

    impenetrable barrier:

    A barrier that cannot be crossed or penetrated.

    impenetrable mystery:

    A mystery that is impossible to solve or understand.

    Related Words

    penetrate:

    To succeed in forcing a way into or through (something).

    opaque:

    Not able to be seen through; not transparent.

    inscrutable:

    Impossible to understand or interpret.

    Slang Meanings of impenetrable

    Meaning: So complex that no one can understand it.

    Example Sentence: His explanation was so impenetrable that I just nodded and smiled.

    Meaning: A person who is very private and difficult to read.

    Example Sentence: She's got an impenetrable personality; you can never tell what she's thinking.