U+A827 "ꠧ" Syloti Nagri Vowel Sign Oo Unicode Character

U+A827 "ꠧ" Syloti Nagri Vowel Sign Oo is a combining diacritical mark used in the Syloti Nagri script, which is primarily employed to write the Sylheti language spoken in parts of Bangladesh and northeast India. This vowel sign represents the long "oo" vowel sound and attaches to a consonant character to modify its pronunciation, functioning as a dependent vowel that alters the inherent vowel of the base consonant. Unlike independent vowels, this sign is written as a superscript or attached form, typically appearing above the consonant glyph it modifies, and it is part of the broader Syloti Nagri block added to the Unicode Standard in version 4.0 to support digital representation of this historic and culturally significant script.