\Un*know"\, v. t. [1st un- + know.]
1. To cease to know; to lose the knowledge of. [Obs.]
2. To fail of knowing; to be ignorant of. [Obs.]

\Un*know"\, a. [See Un- not, {Know}.]
Unknown. [Obs.] ``French of Paris was to her unknow.''
--Chaucer.