She was diagnosed with bruxism after frequently grinding her teeth during exams.

bruxism 是医学术语，由希腊语词根 bryx（磨牙）和后缀 -ism（表示状态或病症）组成，指"磨牙症"，即在无意识状态下习惯性磨牙或紧咬牙关的症状。