, can be used as an ad hoc symbol for the close central protruded vowel. Another possible transcription is or (a close central vowel modified by endolabialization), but this could be misread as a diphthong.

Features

Occurrence

Because central rounded vowels are assumed to have protrusion, and few descriptions cover the distinction, some of the following may actually have compression.

Close central compressed vowel

As there are no diacritics in the IPA to distinguish protruded and compressed rounding,

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