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|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 (so phonemically /hː/) 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:
||Black Sea (Shapsug) dialect
||Corresponds to [x] in other dialects.