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noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru, intransitive verb
grinding of the teeth, involuntary nocturnal tooth grinding, bruxism
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noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru, intransitive verb
grinding one's teeth out of anger or vexation, gnashing one's teeth, gritting one's teeth