teeth grinding
noun [ U ] medical specialized uk/ˈtiːθ ˌɡraɪnd.ɪŋ/ us/ˈtiːθ ˌɡraɪn.dɪŋ/
磨牙
the habit of sliding the teeth backwards and forwards over each other, often because you are anxious
Teeth grinding at night can disturb your partner's sleep. 晚上磨牙会影响你伴侣的睡眠。