U+0329 "̩" Combining Vertical Line Below Unicode Character

U+0329 "̩" Combining Vertical Line Below is a diacritical mark that attaches to the base letter beneath it, typically used to modify pronunciation in phonetic transcription. In the International Phonetic Alphabet, it represents a syllabic consonant, indicating that a consonant, such as a nasal or liquid, functions as the nucleus of a syllable, as in the English word "button" where the final 'n' might be marked with this sign. This combining character is invisible on its own but alters the reading of the character it follows, playing a key role in linguistic notation across various scholarly and transcription contexts.