U+31A6 "ㆦ" Bopomofo Letter Oo Unicode Character

U+31A6 "ㆦ" Bopomofo Letter Oo is a phonetic symbol used in the Bopomofo (Zhuyin Fuhao) system, primarily for transliterating certain sounds in Mandarin Chinese and minority languages like Hokkien and Hakka. It represents a close-mid back rounded vowel sound, similar to the "o" in the English word "go" but with a more precise articulation, and is often employed in linguistic or educational contexts to annotate pronunciation in dictionaries and language learning materials. This character, part of the Bopomofo Extended block, specifically denotes a distinct vowel phoneme that appears in Taiwanese Hokkien, distinguishing it from the standard Mandarin "o" sound.