ʉ

Symbol

 * 1)  a.
 * 2)  -coloring or a weak, fleeting, epenthetic or echo.

User notes
The Teuthonista central rounded vowels, from high/close to near-open, are:
 * ʉ ꭏ ɵ ϶ ꭂ

Symbol

 * + r
 * + r