unanswerable

• unaunswerable (obsolete, rare)

un- +‎ answerable

• (UK) IPA^(key): /ʌnˈɑːnsəɹəb(ə)l/

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unanswerable (comparative more unanswerable, superlative most unanswerable)

1. Not answerable; impossible to answer.

   Synonym: answerless

   Antonym: answerable

2. Impossible to dispute or rebut; irrefutable; conclusive.
   • 1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:

     If I have not said much about it before, it was, of course, that the Professor's earnest desire was that no possible rumor of the unanswerable argument which we carried should be allowed to leak out until the moment came when his enemies were to be confuted.

   Synonym: indisputable

   Antonyms: disputable, inconclusive, refutable

unanswerable (plural unanswerables)

1. Something that cannot be answered.

• “unanswerable”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
• unanswerable in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913