Not known
Unfamiliar and not known are semantically related. in secret topic. In some cases you can use "Unfamiliar" instead an adjective phrase "Not known".
Unfamiliar
Unfamiliar adjective - Not known or experienced before.
Not known and unfamiliar are semantically related. Sometimes you can use "Not known" instead an adjective "Unfamiliar".
Mutual synonyms
Cite this Source
Unfamiliar and Not known. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/not_known/unfamiliar
Not known & Unfamiliar. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/not_known/unfamiliar>.
Unfamiliar or Not known. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/not_known/unfamiliar.
Google Ngram Viewer shows how "not known" and "unfamiliar" have occurred on timeline