U+11599 "𑖙" Siddham Letter Ttha Unicode Character

U+11599 "𑖙" Siddham Letter Ttha is a grapheme from the Siddham script, a historical abugida used primarily for writing Sanskrit and Buddhist texts in East Asia, particularly in Japan. This specific character represents the aspirated voiceless retroflex stop consonant, often transliterated as "ttha" in modern Romanization. It functions as a consonant letter in the script's syllabic system, where each character inherently carries the vowel 'a', though diacritical marks can modify the vowel sound. The Siddham script holds significant religious and aesthetic value in Japanese esoteric Buddhism, where it is frequently employed in mantras, sutras, and ritual inscriptions, preserving a cultural link to ancient Indian writing traditions.