un·an·swer·a·ble
(ŭn-ăn′sər-ə-bəl)adj. Impossible to answer or refute; incontrovertible: unanswerable accusations.
un·an′swer·a·bil′i·ty, un·an′swer·a·ble·ness n.
un·an′swer·a·bly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
unanswerability
(ʌnˌɑːnsərəˈbɪlɪtɪ) nthe quality of not being answerable or contestable
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014