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
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for firm (up)
Verb
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Dodgers left-hander Justin Wrobleski shouted two words — the first of which didn’t appear to be fit for print — and strode off the mound, the icy expression on his face frozen in place all the way to the dugout.—
Maddie Lee,
Los Angeles Times,
30 May 2026 -
But it's also made people even more skeptical of public figures whose appearances seem naturally frozen in time.—
Charles Trepany,
USA Today,
29 May 2026
Verb
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Enterprises that spent years hardening endpoints, strengthening identity controls and building sophisticated security operations centers are now layering AI capabilities on top of existing environments without adapting the controls needed to govern them securely.—
Emil Sayegh,
Forbes.com,
1 June 2026
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Dark lunar maria are visible sprawling across the moon's surface, where lava once rose to the surface before hardening to form enormous basaltic plains.—
Anthony Wood,
Space.com,
1 June 2026
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Cite this Entry
“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 6 Jun. 2026.
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