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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 unassailably
Historical Examples
  • It was respectable; it was unassailably effective; it was not included in the Commandments.

    The Pastor's Wife Elizabeth von Arnim
  • But definite, I think—utterly and unassailably definite—although quite Christian-scientifically foggy in its phrasing.

  • But definite, I think—utterly and unassailably definite—although quite Christian-Scientifically foggy in its phrasing.

    Christian Science Mark Twain (Samuel Clemens)
  • The girl smiled with pleasure, but Clarke remained so unassailably serious that Serviss was moved to further deeps of audacity.

    The Tyranny of the Dark Hamlin Garland
  • Until faith in these fundamental truths has been unassailably established, no basis for Christianity has been secured.

    Browning and Dogma Ethel M. Naish
British Dictionary definitions for unassailably


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 unassailably



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

Online Etymology Dictionary, © 2010 Douglas Harper
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