Clammed up
Undercover and clammed up are semantically related. in uncommunicative topic. In some cases you can use "Undercover" instead an adjective "Clammed up".
Undercover
Undercover adjective - Undertaken or done so as to escape being observed or known by others.
Clammed up and undercover are semantically related. Sometimes you can use "Clammed up" instead an adjective "Undercover".
Cite this Source
Undercover and Clammed up. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/clammed_up/undercover
Clammed up & Undercover. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/clammed_up/undercover>.
Undercover or Clammed up. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/clammed_up/undercover.
Google Ngram Viewer shows how "clammed up" and "undercover" have occurred on timeline