Definitions

mettle

[met-l] / ˈmɛt l /

NOUN

boldness, strength of character

Synonyms

STRONGEST

bravery caliber courage fortitude grit spunk stamina temperament

STRONG

animation ardor arete backbone daring dauntlessness disposition energy fire force gallantry gameness guts hardihood heart indomitability kidney life makeup moxie nature nerve pluck quality resolution resolve spirit stamp starch temper valor vigor vitality

Antonyms

STRONGEST

cowardice timidity weakness

STRONG

apathy dullness fear idleness inactivity indecision lethargy powerlessness question

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But Tort’s Knights have repeatedly shown mettle, especially when playing from behind.

From The Wall Street Journal • Jun. 10, 2026

It will also test the mettle of the front-runners.

From Slate • May 26, 2026

This was a monumental test of Hearts' mettle and they passed it, with a world of help from Hibs and their self-destructive red cards.

From BBC • Apr. 26, 2026

While that may be unfashionable in today’s world of prediction markets, cryptocurrencies, and highflying artificial-intelligence bets, Vanguard Wellington has long proven its mettle and is likely to keep doing so.

From Barron's • Apr. 3, 2026

“By this means I will test the mettle of Cristiana and her two suitors,” I said.

From "Ophelia" by Lisa Klein

Vocabulary lists containing mettle

The Vocabulary.com Top 1000

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

The Tragedy of Macbeth

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Unit 3: Compelling Evidence

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!