as in to freeze
to become physically firm or solid
wait for the modeling clay to firm up before handling the finished pot
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Example Sentences
Recent Examples of Synonyms for firm (up)
Verb
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The harder question, raised again and again at the conference, is how to write sensible rules without freezing the experimentation that makes the technology worth having.—
Dara-Abasi Ita,
Forbes.com,
12 June 2026 -
Cover tightly with plastic wrap and freeze at least 6 hours (or up to 7 days).—
Katlyn Moncada,
Better Homes & Gardens,
12 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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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 19 Jun. 2026.
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