Definitions

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.

"If Plaid is the largest party after the election and has managed to depose Labour after a century, frankly he's going to be unassailable," he said.

From BBC • Apr. 20, 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

Zimbabwe are now on an unassailable five points with a game to still to come, while Ireland are third on three points.

From Barron's • Feb. 17, 2026

Ultimately, 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 • Jan. 28, 2026

I felt drawn by professionalism to the edge of sterility, capable of no more than pedantic, lifeless, unassailable prose.

From "Hunger of Memory" by Richard Rodriguez

Vocabulary lists containing unassailable

Julius Caesar

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A Doll's House

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