adjective

indubitable

in-DOO-bi-tuh-bul/ɪnˈduːbɪtəbl/

Impossible to doubt or question.

The runner's victory is indubitable as all the others remain far behind.

An indubitable race winner: one runner alone breaks the finish tape while every other runner is visibly well behind, and the finish official unmistakably acknowledges that runner.
Etymology

The negative prefix rules out the possibility of doubting: something indubitable is not merely undoubted in practice, but too plain to admit of doubt.

In context

Enhanced Public Domain236:45
some knowledge such as the knowledge of the existence of our sense data appears quite indubitable however calmly and thoroughly we reflect upon it
1910s Philosophy: Bertrand Russell - The Problems of Philosophy (Audiobook)

More examples

  • Her talent is indubitable, even if you dislike her music.
  • The video offers indubitable evidence that he crossed the finish line first.
  • We need to separate indubitable facts from untested assumptions.

Forms

indubitable

indubitably adverb — In a way that excludes doubt.

Similar words

undeniable
Often describes something too obvious or evident to deny.
incontrovertible
Emphasizes evidence or arguments that cannot be successfully challenged.