firm (up)

verb

Definition of firm (up)next
as in to freeze
to become physically firm or solid wait for the modeling clay to firm up before handling the finished pot

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for firm (up)
  1. freeze
  2. harden
Verb
  • Two Utah residents who hiked Mount Shasta in Northern California were rescued after they became stranded during a perilous 36-hour journey through freezing conditions.
    — Tony Briscoe, Los Angeles Times, 17 Oct. 2026
  • In winter, some wetlands become more accessible as thick, spongelike layers of organic-rich peat freeze solid and become strong enough to support snow machines on their icy surfaces.
    — Literary Hub, Literary Hub, 16 Oct. 2026
Definition of freeze
Verb
  • As cleanliness standards harden, so does a guest’s leverage when something’s visibly wrong.
    — Ashley Lynch, Kansas City Star, 16 Oct. 2026
  • Now the companies that recover fastest treat a short, honest, imperfect first statement as more valuable than a polished one that arrives after the narrative has already hardened.
    — Ronn Torossian, Forbes.com, 16 Oct. 2026
Definition of harden
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

firms (up)
firm (up)
first
See all Nearby Words

Cite this Entry

“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 20 Oct. 2026.

Copy Citation
Love words? Need even more definitions?

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

Last Updated: - Updated example sentences

Popular in Grammar & Usage

See More

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

'Can' vs. 'May'

'Affect' vs. 'Effect'

More Commonly Mispronounced Words

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

Popular in Wordplay

See More

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Did 'orange' the fruit or the color come first?

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

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

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

The Longest Long Words List

9 Words That Sound Like Insults But Aren't
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
artwork of illustrated limes with the text limes and smile with an arrow connecting the two words
Quiz: Spot the Anagram! Scramble these words to find new words with the e...
See All