unknow
Un*know", v. t. Etym: [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. Etym: [See Un- not, Know.] Defn: Unknown. [Obs.] "French of Paris was to her unknow." Chaucer.