-ləs adjective
Etymology: Latin stridulus, from stridere, stridēre to creak — more at strident
1.
a. : making a shrill, creaking sound : squeaky
the stridulous cries of the gulls — Jean Stafford
b. : having or producing the effect of a harshly unpleasant grating sound
these harsh and stridulous pieces … had an instantaneous success with the public — Oscar Cargill
2. : characteristic of or affected with stridor
• strid·u·lous·ly adverb