O with breve (О̆ о̆; italics:
О̆ о̆) is a letter of the Cyrillic script. In all its forms, it is a homoglyph of the Latin letter O with breve (Ŏ ŏ Ŏ ŏ).O with breve is used in Itelmen, where it represents the extra-short close-mid back rounded vowel pronounced as /[ŏ]/ (although the newspaper Aboriginal of Kamchatka uses О with ring above instead).
It is also used in an alphabet of Khanty instead of О with diaeresis, where it represents the close-mid front rounded vowel pronounced as /[ø]/.