unquestionable
Not open to debate
Unquestionable describes something so certain or evident that no reasonable person would challenge it: Her talent is unquestionable.
It applies to facts, authority, or qualities beyond dispute.
He was a man of unquestionable integrity.
The word often serves as emphatic endorsement—calling something unquestionable preempts doubt before it arises.
Impossible to contradict
- incontrovertibleImpossible to deny
- indisputableImpossible to contest
- irrefutableImpossible to disprove
- conclusiveEnding all debate
definitive · unarguable · unimpeachable · categorical · unequivocal · unambiguous · clear-cut · beyond doubt
Having recognized expertise
- sovereignSupreme in power
- supremeHighest in authority
- commandingExerting strong authority
- imperativeUnavoidably necessary
dictatorial · dogmatic · peremptory · unassailable · absolute · ultimate · unchallengeable · paramount
Confirmed with evidence
- corroboratedConfirmed as true
- verifiedConfirmed as accurate
- authenticatedConfirmed as legitimate
- documentedPreserved in official records
demonstrable · empirical · factual · objective · sound · solid · credible · reliable
Free from any defect
- irreproachableImpossible to criticize
- unimpeachableBeyond criticism or doubt
- blamelessFree of wrongdoing
- above reproachBeyond any criticism
spotless · unblemished · untarnished · trustworthy · honorable · upstanding · virtuous · principled
undeniable
Impossible to contradict
- incontrovertibleImpossible to deny
- indisputableImpossible to contest
- irrefutableImpossible to disprove
conclusive · definitive · unarguable · unimpeachable · categorical · unequivocal · unambiguous · clear-cut · beyond doubt · watertight
authoritative
Having recognized expertise
- sovereignSupreme in power
- supremeHighest in authority
- commandingExerting strong authority
imperative · dictatorial · dogmatic · peremptory · unassailable · absolute · ultimate · unchallengeable · paramount · dominant
substantiated
Confirmed with evidence
- corroboratedConfirmed as true
- verifiedConfirmed as accurate
- authenticatedConfirmed as legitimate
documented · demonstrable · empirical · factual · objective · sound · solid · credible · reliable · trustworthy
impeccable
Free from any defect
- irreproachableImpossible to criticize
- unimpeachableBeyond criticism or doubt
- blamelessFree of wrongdoing
above reproach · spotless · unblemished · untarnished · trustworthy · honorable · upstanding · virtuous · principled · sterling
unquestionabledebatable
Open to question
disputable · arguable · contestable · controvertible · refutable
unquestionablequestionable
Of uncertain validity
dubious · suspect · illegitimate · disputed · contested