English Reference
Adjective

undeniable

adj.
B2 Upper Intermediate US /ˌəndɪˈnaɪəbəɫ/ UK /ˌʌndɪnˈaɪəbəl/ un·de·ni·able

adj.clearly true and impossible to argue with. You use this when something is so obvious that nobody can say it is wrong.

adj.impossible to deny or dispute; clearly established as true. Often used to emphasize the strength of evidence or the presence of a specific quality.


SIMPLE

The evidence against the suspect was undeniable.

CONTEXTUAL

Despite the team's recent losses, their star player's talent remains undeniable to everyone in the league.

COMPLEX

While the economic impact of the new policy is still being debated, the undeniable improvement in local air quality has won over many former critics.

Usage

Often used with 'fact', 'truth', or 'evidence'. Frequently follows linking verbs like 'be', 'seem', or 'remain'.

But there is an undeniable astuteness and agility in the storytelling here on which Ross can build.

The Guardian· 31 Aug 2026

Their appeal is undeniable, and our Smithsonian Magazine Photo Contest entrants are fans.

Smithsonian Magazine· 26 Jun 2026

From un- + deny + -able, compare deniable.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated