Darth InSidious

Have you ever come across a voiceless retroflex sibilant in your joyful jaunts through the realms of cryptic languages? If so, how is one pronounced? Or how are two pronounced, for that matter? It annoys me greatly because as a practitioner of languages using Devanagari, I am expected to be able to say it, and yet I cannot. Any assistance would be welcomed with open arms and legs.

Yours congruently,

Emperor of the High Seas

P.S. Consider smuggling Amisulpride into your physiology as it makes mornings quite fresh, creative and inordinate.