UNKNOW

Source: 566, 567

unknow. Unknow, v.t. unknew, pret. unknown, pa. to cease to know longer, to forget

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Un‐know″ (?), v. t. [[1st un- + know.]] 1. 1. To cease to know; to lose the knowledge of.
2. 2. To fail of knowing; to be ignorant of.