indubitable

About 0.33 uses per million words.

Meaning

1. adjective Clearly true; providing no possibility of doubt.

   The indubitable effect of the potion convinced many nonbelievers.

2. noun That which is indubitable.

   If we build logically upwards from a few indubitables, the whole system must remain correct.

Similar words

unquestionable beyond doubt undoubtable undeniable indubitate certain irrefutable ironclad definite absolute

Often followed by

evidence that fact proof and truth facts proofs signs

Word family

indubitabilities indubitability indubitableness indubitablenesses indubitably