strid·u·late /ˈstrɪʤəˌlet/
  (vi.)發出尖而高的聲音,吱吱叫鳴
  Strid·u·late v. t.  To make a shrill, creaking noise; specifically Zool., to make a shrill or musical sound, such as is made by the males of many insects.
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  stridulate
       v : make a shrill creaking noise by rubbing together special
           bodily structures; "male insects such as crickets or
           grasshoppers stridulate" [syn: clitter]