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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Example Sentences
Recent Examples of Synonyms for firm (up)
Verb
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Their recipes are developed by veterinary nutritionists; plus, it's gently cooked and frozen to eliminate preservatives.—
Jessica Moore,
USA Today,
8 May 2026 -
Mamdani reacts to vote Mayor Zohran Mamdani ran on a campaign promise to freeze the rent, and back in February appointed six of the nine Rent Guidelines Board members.—
Adi Guajardo,
CBS News,
8 May 2026
Verb
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Scores of hardened, dangerous criminals are being paroled every year thanks to the Massachusetts Parole Board appointed by liberal Democrat Maura Healey.—
Joe Battenfeld,
Boston Herald,
14 May 2026
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The process relies on urushi, a natural lacquer derived from tree sap that hardens over time into a durable, food-safe coating.—
Kansas City Star,
Kansas City Star,
14 May 2026
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 16 May. 2026.
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