aversion therapy
US /əˈvɜːr.ʒən ˌθer.ə.pi/
UK /əˈvɜːr.ʒən ˌθer.ə.pi/

1.
a type of behavior therapy designed to make a patient give up an undesirable habit by causing them to associate it with an unpleasant effect.
:
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Aversion therapy is sometimes used to treat addiction.
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The patient underwent aversion therapy to stop smoking.