Cite this Source
Yawning and Concave. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/concave/yawning
Concave & Yawning. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/concave/yawning>.
Yawning or Concave. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/concave/yawning.
Google Ngram Viewer shows how "concave" and "yawning" have occurred on timeline