noun (common) (futsuumeishi) idiomatic expression feeble anger (that one cannot act on because one is powerless);the clenching teeth of a dried sardine

noun (common) (futsuumeishi)noun or participle which takes the aux. verb suruintransitive verb involuntary nocturnal tooth grinding;bruxism

noun (common) (futsuumeishi)noun or participle which takes the aux. verb suruintransitive verb grinding one's teeth out of anger or vexation