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

Would I have liked to hear more from the late Jane Henson, Jim’s wife and first collaborator on the Washington, D.C.-based “Sam and Friends”? Indubitably.

From Los Angeles Times • May 30, 2024

Indubitably, a magnitude 6.8 quake—a value that may rise or fall as seismologists refine their calculations over the coming days—is a severe event.

From National Geographic • Sep. 11, 2023

Indubitably it’s both, as Ron Burgundy might put it.

From Salon • May 26, 2012

Indubitably, there are excellent reviewers around, some with a devoted following, but most are indistinguishable from the unpaid ones.

From The Guardian • Apr. 7, 2010

Indubitably, sir; but the misfortune is—he! he! he!—Mr.

From The Parent's Assistant Stories for Children by Edgeworth, Maria