unrounding

v.

不以嘴唇呈圆形而发音( unround的现在分词 )；

On the oj · uj〉ɯj unrounding
Unrounding the corners of collaborative family health care
The Unrounding of /u:/ and /u/ in Middle English: A Constraint-based Approach
An Optimality-Theoretic Account of Rounding Harmony Typology
Phonetic vs. phonological rounding in Athabaskan languages*
영국영어에서 〈u〉의 발음과 분포
A production account of sound changes affecting diphthongs and triphthongs in Romance
Social change and language change in a rural Russian community
On diachronic linguistics, variation and English phonology
The Pronunciation of English in the Atlantic States: Based upon the Collections of the Linguistic Atlas of the Eastern United States