[ü͍]listen (help·info) This is a somewhat centralized close back compressed vowel, [ɯ͡β̞], pronounced with the lips compressed toward each other but neither rounded like [ u ] nor spread to the sides like [ɯ]. There is no IPA symbol for lip compression, and the combination of round vowel with spread diacritic "[u͍]" is an ad hoc transcription.