Inexpugnable

//ˌɪnɛkˈspʌɡnəbəl// adj

Definitions

Adjective
  1. 1
    Impossible to eliminate or destroy; impregnable.

    "My one hope of the world, my inexpugnable consolation in looking at the miseries of the world, is that this is altering."

Adjective
  1. 1
    incapable of being overcome, challenged or refuted wordnet

Etymology

Learned borrowing from Latin inexpugnābilis. Morphologically, from in- + expugn + -able.

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