Firm up
Firm up verb - To become physically firm or solid.
Usage example: wait for the modeling clay to firm up before handling the finished pot
Cite this Source
Temper and Firm up. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/firm_up/temper
Firm up & Temper. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/firm_up/temper>.
Temper or Firm up. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/firm_up/temper.
Google Ngram Viewer shows how "firm up" and "temper" have occurred on timeline