unknown

unknown region

little-known

unknown person

lack of wisdom

not familiar

not properly known

unknown availability status

unknown correction status

unknown mode

inapplicable mode

unknown text type

unknown certainty

From Middle English *unknowen, *uniknowen, uniknowe, from Old English unġecnāwen (“unknown”), equivalent to un- + known.

To undo the process of knowing, to lose knowledge of something.

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