unassailable
Americanadjective
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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.
adjective
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not able to be attacked
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undeniable or irrefutable
Other Word Forms
Etymology
Origin of unassailable
1590–1600; un- 1 + assailable ( def. )
Explanation
The adjective unassailable means without flaws or loopholes. If you are going to get home late (again!), you'd better have an unassailable alibi for your parents, or else you should plan on not seeing the outside of your room for a while. The adjective unassailable also means immune to attack or doubt, such as an unassailable military holding or an unassailable reputation. Unassailable can also mean untouchable or unable to be defeated. If your high school basketball team is leading 92 to 14 with just a couple of seconds to go, the announcer might say you have an unassailable lead. The corrupt politician had so many connections, he seemed unassailable; he always seemed to manage to deflect even a hint of scandal onto others in the party.
Vocabulary lists containing unassailable
Julius Caesar
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A Doll's House
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100 SAT Words Beginning with "U"
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But judging by Barker’s shallow screenplay, I doubt that it will be too long before someone digs deeper, striking an unassailable, solid-gold classic.
From Salon ● Jul. 22, 2026
Goals from Ron Flowers, Bobby Charlton and Jimmy Greaves put England into an unassailable 3-0 lead, with a late consolation from Argentina.
From BBC ● Jul. 12, 2026
The armchair referee system, so far from unassailable, is also unappealable — to U.S. coach Mauricio Pochettino’s dismay.
From Los Angeles Times ● Jul. 2, 2026
Nepal's rapper-turned-politician Balendra Shah held an unassailable lead against ousted prime minister KP Sharma Oli Saturday in the highly contested face-off in the southeastern district of Jhapa, according to data from the Election Commission.
From Barron's ● Mar. 7, 2026
We must stand up amid a system that still oppresses us and develop an unassailable and majestic sense of values.
From "While the World Watched: A Birmingham Bombing Survivor Comes of Age during the Civil Rights Movement" by Carolyn Maull McKinstry
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
