U+1D64 "ᵤ" Latin Subscript Small Letter U Unicode Character

U+1D64 "ᵤ" Latin Subscript Small Letter U is a typographic glyph used primarily in linguistic and phonetic notation, such as in the International Phonetic Alphabet or Uralic Phonetic Alphabet, to represent a reduced, shortened, or secondary articulation of the vowel sound /u/ where it appears in subscript form. It is encoded in the Unicode Phonetic Extensions block and is designed to be placed below other characters to indicate a modification or diacritic-like relationship, often marking a weak, voiceless, or non-syllabic pronunciation of the u sound. This character allows for precise phonetic transcription without altering the main text's line spacing, and it is distinct from the visually similar combining diacritical marks because it is a standalone letterform intended specifically for subscript usage.