as in freezing
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 firming (up)
Verb
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That meant an overnight stay on the mountain in freezing conditions.—
Amber Harding OutKick,
FOXNews.com,
28 Apr. 2026 -
While some lavender species, such as English lavender (Lavandula angustifolia), can tolerate cold temperatures, most varieties will suffer when exposed to consistent winds and freezing conditions.—
Cori Sears,
The Spruce,
27 Apr. 2026
Verb
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Today, homeowners often invest in fire-hardening and see little benefit in their premiums.—
Patrick Wolff,
Oc Register,
2 May 2026
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Observing tips The lunar disk is entirely bereft of shadows during the full moon phase, making this the perfect time to trace the outline of lunar maria — where lava flows filled colossal impact basins billions of years ago before hardening to form sweeping basaltic plains.—
Anthony Wood,
Space.com,
1 May 2026
Verb
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The machine dryer agitates the clothing and prevents fibers from stiffening during drying, which is why clothing comes out feeling soft.—
Emily Benda Gaylord,
The Spruce,
23 Feb. 2026
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The Czech Republic’s new government will seek to transform the defense industry into an engine of the nation’s export economy as the flagship auto sector faces stiffening competition, Karel Havlicek, minister for industry and trade, told us.—
Suzanne Lynch,
Bloomberg,
27 Jan. 2026
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Cite this Entry
“Firming (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firming%20%28up%29. Accessed 4 May. 2026.
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