UNDAUNTABLE Synonyms: 142 Similar and Opposite Words

undauntable

adjective

ˌən-ˈdȯn-tə-bəl

Definition of undauntable

as in courageous

feeling or displaying no fear by temperament the undauntable adventurers who crossed the trackless wilderness in search of El Dorado

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for undauntable

Adjective

And what was the courageous act of the Indiana Fever guard, who turns 30 this month?

— Kase Wickman, Vanity Fair, 12 Aug. 2026
The sun in Leo is expressive, vivacious and deeply courageous.

— Valerie Mesa, PEOPLE, 6 Aug. 2026

Definition of courageous

Adjective

If Pisces was rising on the horizon at your time of birth, your money sector is ruled by go-getter Mars, celestial ruler of the bold and fearless sign of Aries.

— Valerie Mesa, PEOPLE, 14 Aug. 2026
Guzmán is Yvonne Delgado, an innocent yet fearless immigrant farm worker determined to protect her family.

— Denise Petski, Deadline, 13 Aug. 2026

Definition of fearless

Adjective

In her very first on-screen role, Reeves brings a nuanced, brave, and deeply intuitive performance as the titular character, an eight-year-old San Francisco resident who witnesses a horrific crime and has to deal with the emotional fallout.

— Kate Erbland, IndieWire, 11 Aug. 2026
Be brave and ask him if he has been involved with anyone else.

— Harriette Cole, Mercury News, 11 Aug. 2026

Definition of brave

Adjective

Less than a week after being shot and losing a leg while protecting three deputies, heroic Florida K-9 Ace was back on his feet Tuesday for an emotional return to the sheriff's office.

— Michael Sinkewicz, FOXNews.com, 12 Aug. 2026
The character is renowned in the wizarding world for his many heroic deeds, though he’s later revealed as a fraud who took credit for the acts of others after erasing part of their memories.

— Rick Porter, HollywoodReporter, 11 Aug. 2026

Definition of heroic

Adjective

What would be the worst moment in a mere mortal’s career, Hoecht turned into a valiant scene.

— Tim Graham, New York Times, 4 Aug. 2026
Despite Aldis's valiant comeback, including a superplex and a King's Lynn Cloverleaf that nearly secured the win, Gunther ultimately prevailed.

— Alfred Konuwa, Forbes.com, 1 Aug. 2026

Definition of valiant

Adjective

Clearly, Americans didn’t do gallant failure, instead demanding domination over mere participation every time.

— Terry Baddoo, USA Today, 14 June 2026
Commandment was very gallant in defeat for trainer Brad Cox and looks to be on the improve after his seventh-place finish in the Kentucky Derby.

— Danny Brewer, Forbes.com, 8 June 2026

Definition of gallant

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Browse Nearby Words

undamaged

undauntable

undaunted

See all Nearby Words

Cite this Entry

Style

“Undauntable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undauntable. Accessed 19 Aug. 2026.

Copy Citation

Synonyms of undauntable

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

balmy

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

7 Pairs of Commonly Confused Words

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Do you 'say your piece' or 'say your peace'?

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

Words from the 'Odyssey'

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

Is “GIF” Pronounced “Jiff” or “Giff”?

12 Lovely and Unusual Words for the Natural World

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Words from the 'Odyssey'

The Longest Long Words List

Games & Quizzes