strid·u·lous 
(strĭjə-ləs)
(strĭjə-ləs)adj.
1. Characterized by or making a shrill grating sound or noise.
2. Relating to or characterized by stridor.
[From Latin strīdulus, from strīdēre, to make harsh sounds, ultimately of imitative origin.]
stridu·lous·ly adv.