[uhn-uh-sey-luh-buh l]


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 formsun·as·sail·a·bil·i·ty, un·as·sail·a·ble·ness, nounun·as·sail·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unassailable

Contemporary Examples of unassailable

Historical Examples of unassailable

  • "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.


    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 Formsunassailableness, noununassailably, 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

Word Origin and History for unassailable

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

Online Etymology Dictionary, © 2010 Douglas Harper