unquestionable

adjective

un·​ques·​tion·​able ˌən-ˈkwes-chə-nə-bəl 

-ˈkwesh-

: not questionable : indisputable

unquestionable evidence

unquestionable integrity

unquestionably

ˌən-ˈkwes-chə-nə-blē 

-ˈkwesh-

adverb

Synonyms

• undeniable
• indisputable
• indubitable
• irrefutable
• incontestable
• unarguable
• incontrovertible
• conclusive
• unchallengeable
• irrefragable
• unanswerable
• definite
• positive
• inarguable

Examples of unquestionable in a Sentence

a person of unquestionable integrity

His influence on modern art is unquestionable.

Recent Examples on the Web

What had seemed the unquestionable bases of Canadian foreign policy are melting like the glaciers in Greenland. —Margaret MacMillan, Foreign Affairs, 21 July 2025

Its status as a cinematic and psychological landmark remains unquestionable, and likely permanent. —Mark Travers, Forbes.com, 17 June 2025

In a hard cap league, every dollar matters and teams in states with lower taxes have an unquestionable advantage. —Pierre Lebrun, New York Times, 5 June 2025

Because there is an unquestionable love for the material and a passion for the goofier, larger-than-life scenarios of comic book lore. —Maureen Lee Lenker, EW.com, 8 July 2025

Word History

First Known Use

1587, in the meaning defined above

Rhymes for unquestionable

• questionable

Kids Definition

unquestionable

adjective

un·​ques·​tion·​able ˌən-ˈkwəs-chə-nə-bəl 

-ˈkwesh-,

 in rapid speech  -ˈkwesh-nə-;

ˈən-

: not questionable : indisputable

unquestionable evidence

unquestionably

-blē 

adverb