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Definition/Meaning

(adjective)

Impossible to dispute or question; unquestionable.

e.g. The expert's unchallengeable authority on the subject was widely recognized.

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Similar Words

Accomplished

Certain

Inarguable

Incontestable

Incontrovertible

Indisputable

Indubitable

Irrefragable

Irrefutable

Positive

Sure

Unanswerable

Unarguable

Uncontradicted

Undeniable

Unquestionable

Unquestioned

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Opposite Words

Academic

Ambiguous

Controversial

Debatable

Doubtful

Dubious

Equivocal

Hypothetical

Iffy

Inconclusive

Indecisive

Moot

Negotiable

Questionable

Speculative

Theoretical

Uncertain

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Related Words

Absolute

Clear

Conclusive

Decisive

Definite

Unambiguous

Uncontested

Uncontradicted

Undisputed

Unequivocal

Unquestioned

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