U+17C4 "ោ" Khmer Vowel Sign Oo Unicode Character

U+17C4 "ោ" Khmer Vowel Sign Oo is a combining mark used in the Khmer script to represent a long back rounded vowel sound, phonetically equivalent to the "oo" in "boot." This vowel sign modifies a preceding consonant by attaching to its right side, altering the syllable's pronunciation. It functions as part of a complex orthographic system where vowels can appear above, below, or beside consonants, and it is essential for writing many common Khmer words, distinguishing meanings through tonal and length contrasts that are fundamental to the language.