Kenneth means here: LATIN LETTER BIDENTAL PERCUSSIVE, with SMALL LETTER U and SMALL LETTER U, where the diacritic letters would normaly stack on top of each other, above the two stacked LATIN SMALL W letters which represent the IPA bidental sound.
I really don't like this bidental percussive sound. Thanks for my teeth (ooch!), my language does not use it!
No language does. It is used to record "disturbed speech". If you had no lips, for instance, you might approximate [b] with a bidental percussive.
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Michael Everson * * Everson Typography * * http://www.evertype.com

