unknown

Meanings

Adjective

• Not known; unidentified; not well known.

Noun

• 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

Verb

• Past participle of unknow

Origin

• From un- + known, past participle of know. Compare Old English ungecnawen.