Voiceless bidental fricative
The voiceless bidental fricative is a rare consonantal sound used in some languages. The only natural language known to use it is the Shapsug dialect of Adyghe. It is also used for a geminate voiceless glottal fricative in the original version of the constructed language Ithkuil, its offshoot Ilaksh, and the new version of Ithkuil as one of two allophones.Features of the voiceless bidental fricative:
