Illegal
Illegal adjective - Contrary to or forbidden by law.
In secret and illegal are semantically related. In some cases you can use "In secret" instead an adjective "Illegal".
Nearby Words: illegality, illegally
In secret
Mutual synonyms
Cite this Source
In secret and Illegal. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/illegal/in_secret
Illegal & In secret. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/illegal/in_secret>.
In secret or Illegal. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/illegal/in_secret.
Google Ngram Viewer shows how "illegal" and "in secret" have occurred on timeline