grit your teeth

Từ điển Oxford Advanced Learner 8th

grit your ˈteeth idiom
1. to bite your teeth tightly together
•She gritted her teeth against the pain.
•‘Stop it!’ he said through gritted teeth.
2. to be determined to continue to do sth in a difficult or unpleasant situation
•It started to rain harder, but we gritted our teeth and carried on.
Main entry: ↑grit_idiom