involuntary nocturnal tooth grinding 歯噛み [はがみ] /(n,vs) grinding of the teeth/involuntary nocturnal tooth grinding/EntL1633350X/ ------- 歯軋り;歯ぎしり [はぎしり] /(n,vs) (1) involuntary nocturnal tooth grinding/bruxism/(2) grinding one's teeth out of anger or vexation/EntL1313550X/ |