unable

[uhn-ey-buhl]
adjective
lacking the necessary power, competence, etc., to accomplish some specified act: He was unable to swim.

Origin:
1350–1400; Middle English; see un-1, able


See incapable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Unable
Collins
World English Dictionary
unable (ʌnˈeɪbəl)
 
adj (foll by to)
1.  lacking the necessary power, ability, or authority (to do something); not able
2.  archaic incompetent

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

unable
c.1380, from un- (1) "not" + able. Modeled on O.Fr. inhabile or L. inhabilis.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
Even when both partners seem willing, males are often unable to consummate the
  affair.
We seem to be bent on destroying every single resource and unable to talk our
  way out of doing so.
Hogan would spend another pain-filled month in the hospital, unable to leave
  his bed.
My family is unable to locate any information on him.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature