bite the bullet

Từ điển Oxford Advanced Learner 8th

bite the ˈbullet idiom
(informal)to start to deal with an unpleasant or difficult situation which cannot be avoided
•I wasn't happy with the way my career was going so I decided to bite the bullet and look for another job. From the custom of giving soldiers a bullet to bite on during a medical operation without anaesthetic.
Main entry: ↑bite_idiom