unlearn

• POS: Verb (usu participle)
• HYPHEN: un=learn

CIDE DICTIONARY

unlearn, v. t. [1st pref. un- + learn.].

•  To forget, as what has been learned; to lose from memory; also, to learn the contrary of.  [1913 Webster]

  "I had learned nothing right; I had to unlearn everything."  [1913 Webster]
•  To fail to learn.  Dr. H. More.  [1913 Webster]

OXFORD DICTIONARY

unlearn, v.tr. (past and past part. unlearned or unlearnt)
1 discard from one's memory.
2 rid oneself of (a habit, false information, etc.).

ROGET THESAURUS

unlearn

Oblivion

VB forget, be forgetful, fall into oblivion, sink into oblivion, have a short memory, have no head, forget one's own name, have on the tip of one's tongue, come in one ear and go out the other, slip memory, escape memory, fade from memory, die away from the memory, lose, lose sight of, fail to recall, not be able to recall, unlearn, efface, discharge from the memory, consign to oblivion, consign to the tomb of the Capulets, think no more of, cast behind one's back, wean one's thoughts from, let bygones be bygones.