Clammed up and Thoughtless
Opposite meaning terms
Clammed up
Thoughtless is an antonym for clammed up in unwilling to decide topic.
Thoughtless
Thoughtless adjective - Showing a lack of manners or consideration for others.
Clammed up is an antonym for thoughtless.
Cite this Source
Thoughtless and Clammed up. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/clammed_up/thoughtless
Clammed up & Thoughtless. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/clammed_up/thoughtless>.
Thoughtless or Clammed up. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/clammed_up/thoughtless.
Google Ngram Viewer shows how "clammed up" and "thoughtless" have occurred on timeline