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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As the Trump administration freezes and slashes billions of dollars in research funding, meddles with curricula, and threatens international students’ ability to study in the US, governments, universities and research institutions in Canada, Europe and Asia are racing to attract fleeing talent.—
Lex Harvey,
CNN Money,
1 June 2025 -
In parallel, the Trump administration has reportedly frozen more than $2 billion in research grants to elite universities, including Harvard, citing alleged violations of federal directives related to antisemitism and national security, NPR reported.—
Michelle Mbekeani,
Forbes.com,
1 June 2025
Verb
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Related article Ships, sea drones and AI: How NATO is hardening its defense of critical Baltic undersea cables CNN was not able to locate the registered owner of the Jaguar for comment.—
Joseph Ataman,
CNN Money,
20 May 2025
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These devices must be hardened against attackers seeking stealthy persistence.—
Yuriy Bulygin,
Forbes.com,
15 May 2025
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 5 Jun. 2025.
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