Try to forget; put out of one's memory or knowledge.

Roget 506: forget; be forgetful etc. adj.; fall into oblivion, sink into oblivion; have a short memory etc. n., 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.    [cause oneself to forget] unlearn; efface etc. 552, discharge from the memory; consign to oblivion, consign to the tomb of the Capulets; think no more of etc. (turn the attention from) 458; cast behind one's back, wean one's thoughts from; let bygones be bygones etc. (forgive) 918.    ... show more

Discard something previously learnt, like an old habit.

Dutch: afleren, ontwennen