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 sanctions, which will go into effect unless there’s a last-minute deal Friday, will include freezing Iranian assets abroad, halting arms deals with Tehran and penalizing any development of Iran’s ballistic missile program.—
Brie Stimson,
FOXNews.com,
27 Sep. 2025 -
This cake can also be frozen for up to two months.—
Kimberly Holland,
Southern Living,
27 Sep. 2025
Verb
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The material also had to harden with strength similar to natural bone and gradually break down so new bone could replace it.—
Bojan Stojkovski,
Interesting Engineering,
27 Sep. 2025
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Here, the situation has changed, leaving many of the gods either hardened or embittered by the conflict.—
Christopher Cruz,
Rolling Stone,
27 Sep. 2025
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 30 Sep. 2025.
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