Clam up
Clam up verb - To stop talking.
Stopple
Stopple verb - Close or secure with or as if with a stopper.
Cite this Source
Stopple and Clam up. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/clam_up/stopple
Clam up & Stopple. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/clam_up/stopple>.
Stopple or Clam up. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/clam_up/stopple.
Google Ngram Viewer shows how "clam up" and "stopple" have occurred on timeline