formidable

adjective

ˈfȯr-mə-də-bəl How to pronounce formidable (audio)
Definition of formidablenext
1
as in terrifying
causing fear a formidable, irascible old man who frightened the neighborhood children

Synonyms & Similar Words

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Antonyms & Near Antonyms
2
as in difficult
requiring considerable physical or mental effort running a marathon is a formidable undertaking

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

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.
Recent Examples of formidable Mills will face three Republican challengers in Tuesday’s primary, with former local news anchor Ryan Elijah emerging as his most formidable opponent. — Rena Rowe, The Washington Examiner, 14 Aug. 2026 From market to technology source China has built formidable positions across a growing number of technology industries. — Jenny Lee, CNBC, 14 Aug. 2026 And with or without Kawhi Leonard, the Toronto Raptors are a formidable Eastern Conference opponent, though the Knicks have won 13 games in a row against their rivals in the north. — Kristian Winfield, New York Daily News, 13 Aug. 2026 Like her predecessor, Elena of London has proven formidable on the circuit, scoring victories at the 2018 Royal Regatta Cannes, the 2019 Les Voiles de Saint-Tropez, and, most recently, the 2026 Richard Mille Cup. — Rachel Cormack, Robb Report, 13 Aug. 2026 See All Example Sentences for formidable
Recent Examples of Synonyms for formidable
  1. terrifying
  2. difficult
  3. frightening
  4. challenging
  5. scary
  6. tough
  7. terrible
  8. rigorous
Adjective
  • Video captured recently in Botswana shows the terrifying moment a tourist boat had to outpace a charging hippo.
    — Maureen O'Hare, CNN Money, 15 Aug. 2026
  • The bandages, cuts and stitches were still fresh from the terrifying attack on Jones Street on Wednesday evening.
    — Tammy Mutasa, CBS News, 14 Aug. 2026
Definition of terrifying
Adjective
  • The shortcomings of Usman and Dvalishvili, future Hall of Famers, only point to how difficult the historic mark was to reach.
    — Mark Puleo, New York Times, 16 Aug. 2026
  • The Teamsters have been enthusiastically endorsing the bill specifically because, while 40-something employers would be difficult to collectively bargain against, DSP workers would be much easier to organize once within Amazon.
    — Tiana Lowe Doescher, The Washington Examiner, 15 Aug. 2026
Definition of difficult
Adjective
  • But the ordeal was frightening and bewildering for Cliffel, who still didn't know what had caused her behavior.
    — Deborah Becker, NPR, 16 Aug. 2026
  • There’s a frightening imbalance in how the mainstream media report on these candidates, which tends to take it pretty easy on the latter.
    — Chicago Tribune, Chicago Tribune, 14 Aug. 2026
Definition of frightening
Adjective
  • The champion faced a challenging opponent, as Garry forced him to work hard for seven takedowns and inflicted some facial damage.
    — Brian Mazique, Forbes.com, 16 Aug. 2026
  • The current outbreak, caused by the rare Bundibugyo Ebola virus, is unfolding in some of the most challenging conditions imaginable.
    — ABC News, ABC News, 15 Aug. 2026
Definition of challenging
Adjective
  • After the crew leaves the island with the sun god’s cattle, the seas are vicious, scary, and violent.
    — Wisdom Iheanyichukwu, Vanity Fair, 17 Aug. 2026
  • The 13-year-old has his life back after a scary ordeal with epilepsy that seemed to come out of nowhere three years ago.
    — Stephanie Stahl, CBS News, 17 Aug. 2026
Definition of scary
Adjective
  • Coventry, for example, face Manchester City away in Gameweek Three, while some of the teams worth targeting early like Manchester United, Chelsea and Sunderland have tougher fixtures in Gameweeks Three or Four.
    — Abdul Rehman, New York Times, 14 Aug. 2026
  • This summer has seen a confluence of challenges, including excessive heat that allows food contamination to grow and a pathogen that’s particularly tough to pin down.
    — Deidre McPhillips, CNN Money, 13 Aug. 2026
Definition of tough
Adjective
  • That Crowley came from behind to win was a testament to Evers’ grit and determination to keep the nomination from Hong, whom Evers said was unlikely to win in November, and to how terrible of a campaigner Hong turned out to be in the home stretch.
    — The Editorial Board, Chicago Tribune, 12 Aug. 2026
  • Although the Constitution requires congressional involvement in war-making, Trump like Nixon disdained that mandate with terrible consequences.
    — Elizabeth Holtzman, New York Daily News, 12 Aug. 2026
Definition of terrible
Adjective
  • Thanks to the shrinking publishing industry and dwindling writerly job market, the internet is rife with smart freelance editors, rigorous copy editors, and award-winning authors moonlighting as book doulas.
    — Keziah Weir, Vanity Fair, 13 Aug. 2026
  • Every personal loan article is based on rigorous reporting by our team of expert writers and editors with extensive knowledge of personal loan products.
    — Jasmin Suknanan, CNBC, 13 Aug. 2026
Definition of rigorous

Browse Nearby Words

formidability
formidable
forming
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Cite this Entry

“Formidable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/formidable. Accessed 18 Aug. 2026.

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Nglish: Translation of formidable for Spanish Speakers

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