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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After that, freeze credit, file an identity theft report and remove exposed personal information from the web.—
Kurt Knutsson,
FOXNews.com,
19 June 2026 -
Eugene Mymrin/Getty Images With the Federal Reserve electing to keep interest rates frozen again this week – its fourth such pause in 2026 – savers can comfortably take the time to shop around for a savings account that works for them and their goals.—
Matt Richardson,
CBS News,
18 June 2026
Verb
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Anna, her hauteur hardening like a protective shell, is aghast.—
Theater Critic,
Los Angeles Times,
19 June 2026
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As patterns become clear and predictable, the organization hardens them into deterministic rules.—
Jakob Freund,
Forbes.com,
18 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 21 Jun. 2026.
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