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Synonyms

unquestionable

American  
[uhn-kwes-chuh-nuh-buhl] / ʌnˈkwɛs tʃə nə bəl /

adjective

  1. not open to question; beyond doubt or dispute; indisputable; undeniable; certain.

    an unquestionable fact.

  2. above criticism; unexceptionable.

    a man of unquestionable principles.


unquestionable British  
/ ʌnˈkwɛstʃənəbəl /

adjective

  1. indubitable or indisputable

  2. not admitting of exception or qualification

    an unquestionable decision

"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

Synonym Usage

See doubtless ( def. ).

Other Word Forms

Derived Forms

Etymology

Origin of unquestionable

First recorded in 1590–1600; un- 1 + questionable

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.

"It's absolutely unquestionable that there's a very challenging situation facing the DfC along with all other departments right across the Executive," Gildernew said.

From BBC • May 3, 2026

“It’s unquestionable that climate change and environmental impacts are impacting the speed and severity of which things change. ... Climate resilience has to be part of the conversation.”

From Los Angeles Times • Jan. 27, 2026

“She displayed unquestionable strength and brought attention to the realities of powerful men in our orbit and the misconduct that has persisted for decades without repercussion.”

From Los Angeles Times • Jul. 2, 2025

His passion for theatre is unquestionable but his task in this job will be to champion other people’s work as well as his own.

From BBC • Sep. 13, 2024

Candidate instructors, it stipulated, were to have a fluent knowledge of both the French and English languages, and only those of temperate habits and unquestionable character need apply.

From "Nine Stories" by J. D. Salinger

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