gnash one's teeth 咬牙切齿

“咬牙切齿”，汉语成语，意思是形容极端仇视或痛恨，也形容把某种情绪或感觉竭力抑制住。可以翻译为“gnash one's teeth(at/over)，file one's teeth”等。

例句：

气得咬牙切齿

grind one's teeth in anger

她咬牙切齿地回答。

She answered through clenched teeth.