indubitably

American  

[in-doo-bi-tuh-blee, in-dyoo‐] / ɪnˈdu bɪ tə bli, ɪnˈdyu‐ /

adverb

1. in a way that is patently evident or certain; unquestionably; without doubt.

   A week at the spa has indubitably improved his health.

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indubitably British  

/ ɪnˈdjuːbɪtəblɪ /

adverb

1. without doubt; certainly

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Etymology

Origin of indubitably

First recorded in 1620–30; indubitable ( def. ) + -ly ( def. )

Explanation

Indubitably means "without doubt." If you say that you are indubitably going to run for class president, you're sure of it. With five syllables, indubitably is kind of a mouthful. Here's how to say it: "in-DOO-bit-a-blee." And while it is more of an old-fashioned adverb, indubitably remains a unique way to say "undoubtedly." In fact, doubt and indubitably share a root in the Latin word dubitabilis, meaning "doubtful." Adding the prefix in- makes something done indubitably without a doubt.

Example Sentences

The question will need to be answered by understanding the only subjectivity we are indubitably confident of: our own.

From Scientific American • Sep. 8, 2023

In the process, they have created a stadium that does, indeed, feel indubitably SoCal — a place that is both indoors and out, a place where intimate experiences can be had amid the industrial scale.

From Los Angeles Times • Feb. 8, 2022

But the history of U.S. democracy also indubitably has its dark sides.

From Salon • Nov. 1, 2020

Using independent contractors to provide services has indubitably become the keystone of a generation of tech companies, from ride-hailing apps to food delivery services like DoorDash to hair and makeup services like Glamsquad.

From New York Times • Mar. 29, 2019

The whole structure of the Karhidish Clan-Hearths and Domains is indubitably based upon the institution of monogamous marriage.

From "The Left Hand of Darkness" by Ursula K. Le Guin