IPA: //dɪsəˈkʌstəm//
KK: /dɪsəˈkʌstəm/
To make someone stop being used to something they were previously familiar with, often to help them break a habit.
The therapist worked to disaccustom her from her old routines.
Past: disaccustomed
Past Participle: disaccustomed
Disaccustom → It is formed from "dis-" (meaning apart or away) and "accustom" (from Old French *acostumer*, meaning to make accustomed). The word "disaccustom" means to make someone unaccustomed or to remove their accustomed habits.
Think of 'dis-' meaning to take away and 'accustom' meaning to make familiar. This helps you remember that 'disaccustom' means to take away someone's familiar habits.