Clammed up
Frown upon and clammed up are semantically related. In some cases you can use "Frown upon" instead a verb "Clammed up".
Frown upon
Frown upon verb - Look disapprovingly upon.
Clammed up and frown upon are semantically related. Sometimes you can use "Clammed up" instead a verb "Frown upon".
Mutual synonyms
Cite this Source
Frown upon and Clammed up. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/clammed_up/frown_upon
Clammed up & Frown upon. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/clammed_up/frown_upon>.
Frown upon or Clammed up. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/clammed_up/frown_upon.
Google Ngram Viewer shows how "clammed up" and "frown upon" have occurred on timeline