English

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Etymology

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From imperishable +‎ -ly.

Adverb

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imperishably (comparative more imperishably, superlative most imperishably)

  1. In an imperishable manner.
    • 1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019:
      The occasion was private and there were no reporters, but Lord Roxton's speech was fixed verbatim in the minds of all his audience and has been imperishably preserved.