Congest and Lighten

Congest

Congest verb - To prevent passage through by filling with something.
Usage example: the usual weekend traffic congested the region's highways

Lighten is an antonym for congest.

Lighten

Lighten verb - To become glad or hopeful.

Congest is an antonym for lighten.

Cite this Source
Lighten and Congest. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/congest/lighten
Congest & Lighten. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/congest/lighten>.
Lighten or Congest. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/congest/lighten.
Google Ngram Viewer shows how "congest" and "lighten" have occurred on timeline