忘掉,從腦中掃除掉,去掉…的弊習
Unlearn \Un*learn"\, v. t. [1st pref. un- + learn.] 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. To fail to learn. [Obs.] --Dr. H. More.
unlearn v 1: try to forget; put out of one's memory or knowledge 2: discard something previously learnt, like an old habit [also: {unlearnt}]