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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In general, creditors cannot simply freeze your bank account on their own.—
Angelica Leicht,
CBS News,
27 Mar. 2026 -
Skies are expected to clear, and winds are expected to calm down overnight Friday, which will allow temperatures to drop to or below freezing early Saturday morning.—
Kansas City Star,
Kansas City Star,
27 Mar. 2026
Verb
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Saline rinses at the first sign of congestion can prevent mouth breathing from hardening into habit.—
Allison Palmer,
Charlotte Observer,
26 Mar. 2026
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Iran and the United States hardened their positions as a diplomatic push for a ceasefire in the Middle East war appeared to falter on Thursday.—
Jon Gambrell,
Fortune,
26 Mar. 2026
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 2 Apr. 2026.
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