Must not and May
Opposite meaning terms
Must not
May
May noun - The month following April and preceding June.
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Synonyms for May
Must not is an antonym for may.
Cite this Source
May and Must not. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/must_not/may
Must not & May. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/must_not/may>.
May or Must not. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/must_not/may.
Google Ngram Viewer shows how "must not" and "may" have occurred on timeline