磨牙 móyá to grind one's teeth Origin Definitions Defs Strokes Stroke Words Sentences Sents 2 sentences 她现在睡觉会磨牙。 tā xiànzài shuì jiào huì mó yá. She grinds her teeth in her sleep now. Source: AI Challenger 2017有些人为什么会在睡梦中磨牙？ yǒuxiē rén wèishénme huì zài shuìmèng zhōng mó yá? Why do some people grind their teeth in their sleep? Source: CCMatrix