Lighten up
Lighten up verb - Make lighter or brighter.
Slacken and lighten up are semantically related. in let up topic. In some cases you can use "Slacken" instead a verb "Lighten up".
Slacken
Slacken verb - To make less taut.
Mutual synonyms
Cite this Source
Slacken and Lighten up. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/lighten_up/slacken
Lighten up & Slacken. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/lighten_up/slacken>.
Slacken or Lighten up. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/lighten_up/slacken.
Google Ngram Viewer shows how "lighten up" and "slacken" have occurred on timeline