Mum
Mum adjective - Deliberately refraining from speech.
Mutual synonyms
Cite this Source
Unsounded and Mum. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/mum/unsounded
Mum & Unsounded. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/mum/unsounded>.
Unsounded or Mum. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/mum/unsounded.
Google Ngram Viewer shows how "mum" and "unsounded" have occurred on timeline