break a habit
US /breɪk ə ˈhæb.ɪt/
UK /breɪk ə ˈhæb.ɪt/

1.
改掉習慣, 戒除習慣
to stop doing something that you do regularly or often
:
•
It's hard to break a habit, but it's possible with determination.
改掉一個習慣很難,但只要有決心就有可能。
•
She's trying to break her habit of biting her nails.
她正在努力改掉咬指甲的習慣。