"gnash" in Chinese (Simplified)
咬牙磨牙
Definition
通常指因为生气或不安，将牙齿咬紧或用力摩擦。
Usage Notes (Chinese (Simplified))
多用于正式或文学场合，经常以'gnash your teeth'出现，表达痛苦、愤怒等强烈情绪。不是指普通咀嚼。
Examples
He began to gnash his teeth in anger.
他开始愤怒地**咬牙**。
Do not gnash your teeth when you are upset.
不高兴时不要**磨牙**。
People often gnash their teeth when they are stressed.
人在压力大时经常会**咬牙**。
"If you keep gnashing your teeth like that, you'll hurt your jaw," the dentist warned.
牙医警告：“如果你继续这样**磨牙**，下巴会受伤。”
She had to gnash her teeth to keep from shouting at her boss.
她不得不**咬牙**忍住没对老板喊出来。
Everyone could hear him gnash his teeth during the argument.
争吵时大家都能听到他在**咬牙**。