Known
Known adjective - Apprehended with certainty.
Usage example: a known criminal
Unfamiliar
Unfamiliar adjective - Not known or well known.
Usage example: a name unfamiliar to most
Both words in one sentence
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Romans were also unfamiliar with them as they had fallen out of use pretty much everywhere else in the known world.
Source: Film / The Eagle - For those unfamiliar with the game, ME1 was a classic hero's journey, the only subversion being that Shepard was already well-known in Alliance circles, no matter what origin you chose.
Source: Broken Base / Video Games -
Little was known about Autism or how to treat it in whatever year it was that Raymond had to go to Wallbrook (many laymen were even unfamiliar with the term "autism" when the film was released, which is why the Doctor functions as something of an Exposition Fairy).
Source: Film / Rain Man
Cite this Source
Unfamiliar and Known. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/known/unfamiliar
Known & Unfamiliar. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/known/unfamiliar>.
Unfamiliar or Known. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/known/unfamiliar.
Google Ngram Viewer shows how "known" and "unfamiliar" have occurred on timeline