U+09D7 "ৗ" Bengali Au Length Mark Unicode Character

U+09D7 "ৗ" Bengali Au Length Mark is a combining mark used in the Bengali script to indicate a specific vowel length, specifically the inherent long vowel sound "au" or its lengthened counterpart, functioning as a diacritic that attaches to the preceding consonant or vowel sign to modify pronunciation. It is part of the Bengali block within Unicode and serves a distinct phonetic role in the orthography of languages like Bengali and Assamese, helping to differentiate between short and long vowel sounds in written text.