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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Where did Lucas get the freaky idea of carbon freezing Han Solo from?—
Anthony D'Alessandro,
Deadline,
25 Apr. 2025 -
But Trump’s on-again-off-again tariffs may nevertheless be pushing households and businesses to alter their spending and freeze plans for long-term investment because of how quickly conditions can change, sometimes seemingly by the hour.—
Stan Choe,
Los Angeles Times,
25 Apr. 2025
Verb
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These were also the years when Twain’s contradictions began to harden into gleaming marble.—
Lauren Michele Jackson,
New Yorker,
28 Apr. 2025
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Dirt and sweat can dry and harden your gloves and soil the inside, defeating their purpose of protecting your hands.—
Brandee Gruener,
Southern Living,
22 Apr. 2025
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 3 May. 2025.
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