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[uhn-uh-sey-luh-buh l] /ˌʌn əˈseɪ lə bəl/
not open to attack or assault, as by military force or argument:
unassailable fortifications; unassailable logic.
not subject to denial or dispute:
Shakespeare's genius gives his works an unassailable position in world literature.
Origin of unassailable
1590-1600; un-1 + assailable
Related forms
unassailability, unassailableness, noun
unassailably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for unassailable
Contemporary Examples
Historical Examples
  • "You're just about as satisfying to talk to as a stump," she paid tribute to his unassailable calm.

    Good Indian B. M. Bower
  • That your communion was unassailable, would not prove that mine was indefensible.

    Apologia Pro Vita Sua John Henry Cardinal Newman
  • But,” said I, “you said that on the seaward side the place is unassailable.

    Sir Ludar Talbot Baines Reed
  • The open argument was unassailable, and she contented herself with that.

    Christmas Zona Gale
  • It is not necessary that your judgment should be unassailable.

    Journeys Through Bookland, Vol. 10

    Charles Herbert Sylvester
British Dictionary definitions for unassailable


not able to be attacked
undeniable or irrefutable
Derived Forms
unassailableness, noun
unassailably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unassailable

1590s, from un- (1) "not" + assailable (see assail). Related: Unassailably.

Online Etymology Dictionary, © 2010 Douglas Harper
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