Unknown
Synonyms: Undisclosed, undivulged, unspecified, mysterious, hidden, undetermined, unresolved, unestablished, unsure, unascertained, indefinite, in the balance, up in the air, uncharted, untravelled, virgin, exotic, unidentified, nameless, undesignated, innominate, unheard of, new, strange, little known, minor, unimportant, unrenowned, lowly, forgotten, unrevealed, untold, secret, dark, concealed, undecided, unfixed, unsettled, pending, undefined, inconclusive, in limbo, unexplored, unmapped, undiscovered, remote, outlandish, unnamed, anonymous, incognito, unfamiliar, unprecedented, novel, obscure, unsung, insignificant, undistinguished, inconsequential, and unhonoured.
Example Sentences
The sender's identity remains unknown still.
They ventured into unknown territory bravely.
The cause of illness is unknown.
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