unassailable

[uhn-uh-sey-luh-buhl] / ˌʌn əˈseɪ lə bəl /

ADJECTIVE

certain

Synonyms

STRONGEST

absolute conclusive indisputable infallible irrefutable undeniable unequivocal

WEAK

ascertained authoritative clear confirmable definite demonstrable destined determined establishable evident firm fixed genuine guaranteed hard having down pat in the bag inarguable incontestable incontrovertible indubitable known on ice plain positive predestined provable real reliable safe salted away set sound supreme sure sure thing true trustworthy unambiguous undisputable undoubted unerring unmistakable unquestionable verifiable

Antonyms

STRONGEST

disputable doubtful dubious imperfect indefinite questionable refutable uncertain unsure vague

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 then I hear Chad Bianco and Steve Hilton mewl, and I’m suddenly hoping alongside Anita that someone vanquishes their foes with an unassailable vision.

From Los Angeles Times • Apr. 28, 2026

The desire for a new jazz age is a wish for a new national identity as glamorous and unassailable as old Hollywood.

From Los Angeles Times • Mar. 13, 2026

Mr. Maduro’s prosecution is therefore legally unassailable not because it breaks new ground, but because it so closely follows a 36-year-old template the federal courts have already validated.

From The Wall Street Journal • Jan. 4, 2026

When England fly-half George Ford converted Sale's second try from Alex Wills after 46 minutes, the northwest side seemed to have an unassailable lead.

From Barron's • Nov. 28, 2025

If only they could rescue her; but dementors in those numbers would be virtually unassailable.

From "Harry Potter and the Deathly Hallows" by J.K. Rowling

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