sibilation
 齒擦音發音,惙惙作響
 Sib·i·la·tion n.  Utterance with a hissing sound; also, the sound itself; a hiss.
    He, with a long, low sibilation, stared.   --Tennyson.
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 sibilation
      n 1: a fricative sound (especially as an expression of
           disapproval); "the performers could not be heard over
           the hissing of the audience" [syn: hiss, hissing]
      2: pronunciation with a sibilant (hissing or whistling) sound
         [syn: assibilation]