Middlemarch vocabulary

without in the least degree compromising his unassailable and quite unmerited reputation of being a kind-hearted old curmudgeon,

Marcel Proust. In Search of Lost Time [volume 1] Swann’s Way

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The evidence of his cleverness was of the higher intuitive order, lying in his lady-patients' immovable conviction, and was unassailable by any objection except that their intuitions were opposed by others equally strong;

George Eliot. Middlemarch

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he had regarded his own right over her as the one thing unassailable. Her husband was simply a superfluous and tiresome person.

Leo Tolstoy. Anna Karenina