unworkability
un·work·a·ble
(ŭn-wûr′kə-bəl)adj.
Not workable, especially not capable of being put into practice successfully; not practicable: an unworkable scheme.
un·work′a·bil′i·ty, un·work′a·ble·ness n.
un·work′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.
unworkability
(ˌʌnwɜːkəˈbɪlɪtɪ)n
the quality or state of being unworkable
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014