UNLEARN

unlearn. Unlearn, v.t. to forget, lose, let slip, let go, undo

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Un‐learn″ (?), v. t. [[1st pref. un- + learn.]] 1. 1. To forget, as what has been learned; to lose from memory; also, to learn the contrary of.
I had learned nothing right; I had to unlearn everything. Milner. 2. 2. To fail to learn. Dr. H. More.