Yery with diaeresis (Ӹ ӹ; italics: Ӹ ӹ) is a letter of the Cyrillic script. Its form is derived from the Cyrillic letter Yery (Ы ы Ы ы).
Yery with diaeresis is used in the alphabet of the Mari language, where it represents the close back unrounded vowel /ɯ/.
Read more about Yery With Diaeresis: Computing Codes