unknown
/ʌnˈnoʊn/ noun C2- A variable (usually x, y or z) whose value is to be found.
- Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
- A person of no identity; a nonentity.
Plural unknowns
From the library
What happened in the world before that time is all unknown to me.
He was the more noticed as being the only friend of the past unknown life of Mr.
“I was about to say, as he is unknown to the public.”
As he thus reflected, he felt the sensation we have described, and which had hitherto been unknown to him, arise in his bosom, and fill him with vague apprehensions.
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