Be pertinent
Harden and be pertinent are semantically related. In some cases you can use "Harden" instead a verb phrase "Be pertinent".
Harden
Harden verb - To become physically firm or solid.
Be pertinent and harden are semantically related. Sometimes you can use "Be pertinent" instead a verb "Harden".
Mutual synonyms
Cite this Source
Harden and Be pertinent. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/be_pertinent/harden
Be pertinent & Harden. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/be_pertinent/harden>.
Harden or Be pertinent. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/be_pertinent/harden.
Google Ngram Viewer shows how "be pertinent" and "harden" have occurred on timeline