unlearn
🇺🇸
/ˌʌnˈlɜːrn/
🇬🇧
/ˌʌnˈlɜːn/
To actively forget or stop using something you've learned, often because it's not helpful or is incorrect.
To improve his guitar skills, he had to unlearn some old techniques.
为了提高他的吉他技巧,他不得不忘记一些旧的技巧。