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

Relevance

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 The formidable shadow pool, cut by black liquid liner, was juxtaposed with light brown brows and bubblegum blush on the apples of her cheeks. — Kaleigh Werner, Footwear News, 24 July 2026 Despite Atlassian Service Collection's formidable power, the main interface is highly intuitive. — John Brandon, PC Magazine, 24 July 2026 The financial challenge, however formidable, may pale beside the psychological one. — Daniel Libit, Sportico.com, 23 July 2026 But these wildly ambitious goals that Maunakea and Juarez have for the study face some formidable obstacles. — Angus Chen, STAT, 22 July 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
  • Pinnock, in particular, is at his best here, showcasing a diabolical cruelty and terrifying manipulation, elevating the story and the show to a different level.
    — Aramide Tinubu, Variety, 31 July 2026
  • Here's a selection of spectacular photos of the July Buck Moon 2026 captured alongside gorgeous natural landscapes, terrifying wildfires and stunning cityscapes from around the world.
    — Anthony Wood, Space.com, 30 July 2026
Definition of terrifying
Adjective
  • For a long time, we’ve all been told that remastering the older Super Robot Wars games was extremely difficult, due to all the licensing and other costs involved.
    — Ollie Barder, Forbes.com, 2 Aug. 2026
  • After three difficult years, armed groups loyal to Tehran appear to be bouncing back across the Middle East, reinforcing Iran’s leverage in its war with the US and Israel.
    — Sophie Tanno, CNN Money, 2 Aug. 2026
Definition of difficult
Adjective
  • His solution was to ride at a frightening pace from the outset of stages, hoping to shed his rival from his back wheel — an approach that rewarded him with king of the mountains points throughout the Tour’s final week.
    — Jacob Whitehead, New York Times, 26 July 2026
  • The most frightening scenario to many officials on both sides of the border is that the United States might use Rocha’s case as a pretext to strike Mexico.
    — Kevin Sieff, The Atlantic, 24 July 2026
Definition of frightening
Adjective
  • Even during a challenging season, Stanek continued to showcase one of baseball's hardest fastballs with a plus slider, splitter and sweeper.
    — Peter Chawaga, Forbes.com, 1 Aug. 2026
  • There’s also 20-year-old Connor Zilisch, who’s had a challenging rookie season but is still one of the most prized young drivers to ever join the Cup Series.
    — Alex Kirshner, New York Times, 1 Aug. 2026
Definition of challenging
Adjective
  • The Bang Bang Gang shifted momentum, but sent Clark Connors crashing onto the steel steps in a legitimately scary spot.
    — Alfred Konuwa, Forbes.com, 27 July 2026
  • Video footage obtained by PEOPLE shows the scary moment the slingshot-style ride malfunctioned as one of the wires that attaches to the car appears to abruptly snap off.
    — Natalia Senanayake, PEOPLE, 27 July 2026
Definition of scary
Adjective
  • The city's local Democratic lawmakers claim that the tough-on-crime policies only temporarily reduced crime while troop presence was at its peak.
    — ABC News, ABC News, 31 July 2026
  • Lopez and multiple bullpen arms got out of tough jams to limit the Red Sox 16 baserunners across the first nine innings to just two runs, only one earned.
    — Sean Campbell, Sacbee.com, 30 July 2026
Definition of tough
Adjective
  • My scheduler needed no prompting to tell me the system was terrible.
    — Roger Dooley, Forbes.com, 29 July 2026
  • During that terrible season, 71% of California Dungeness boats stopped fishing and more than 200 jobs were lost.
    — Susanne Rust Follow, Los Angeles Times, 29 July 2026
Definition of terrible
Adjective
  • Academy leaders have repeatedly told Congress that rigorous scholarship, civilian faculty expertise and exposure to complex questions help prepare officers for the uncertainty of modern warfare.
    — James LaPorta, CBS News, 31 July 2026
  • The progress marks the transition from years of design, research, and technology demonstrations to the construction of physical aircraft that will undergo rigorous testing before entering operational service.
    — Prabhat Ranjan Mishra, Interesting Engineering, 31 July 2026
Definition of rigorous

Browse Nearby Words

formidability
formidable
forming
See all Nearby Words

Cite this Entry

“Formidable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/formidable. Accessed 2 Aug. 2026.

Copy Citation

More from Merriam-Webster on formidable

Nglish: Translation of formidable for Spanish Speakers

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See More

7 Pairs of Commonly Confused Words

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

Why does English have so many silent letters?

Your vs. You're: How to Use Them Correctly
See More

Popular in Wordplay

See More

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

The Words of the Week - Jul. 31

Even More Bird Names that Sound Like Insults (and Sometimes Are)
See More

Popular

See More

7 Pairs of Commonly Confused Words

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
asap street sign
Figure Out These Acronyms ASAP You don't have to be a NASA engineer to get these...
See All