背せ開びらきMeaningsNoun1. slicing a fish down its backKanji used背back of the body開openPitch accentせびらきComposed of背せback; reverse; rear side; back (e.g. of a chair); spine (of a book); height; stature; ridge (of a mountain)Noun開ひらきopening; gap; dried and opened fish; extensionNoun