irrefutable.

So securely established or supported that it cannot be successfully refuted on the relevant grounds.

Use it for

Words that belong together

• irrefutable evidence
• irrefutable conclusion

On the page

The dated record supplied irrefutable evidence for the narrow chronological claim.

The conclusion was irrefutable within the agreed assumptions but did not decide the broader dispute.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Comparative more irrefutable; superlative most irrefutable where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: evidence assessment, qualification, argument critique, assumption analysis. Disciplines: argumentation, logic, research interpretation, formal writing. Commonness: moderately common.