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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Saad told the Statesman recently that the ski area opened two-thirds of its terrain this season, and the nonprofit also froze season pass sale prices for next year in an unusual move.—
Nicole Blanchard,
Idaho Statesman,
14 Mar. 2026 -
He’s successfully advocated for creating new incentives for affordable housing construction and automatically renewing a program that freezes property values for some seniors, heading off big bill spikes from rising property values.—
A.D. Quig,
Chicago Tribune,
13 Mar. 2026
Verb
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The facility had been recently hardened with a concrete shell and then covered with soil in the months before the current conflict.—
Sujita Sinha,
Interesting Engineering,
12 Mar. 2026
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But there is a troubling shift that occurs when success hardens into excess and gives way to fear, a paradox that emerges all too often.—
Michael Sonnenfeldt,
Fortune,
12 Mar. 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 16 Mar. 2026.
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