U+1F39 "Ἱ" Greek Capital Letter Iota with Dasia Unicode Character

U+1F39 "Ἱ" Greek Capital Letter Iota with Dasia is a precomposed representation of the Greek letter iota combined with a dasia, or rough breathing mark, indicating an initial aspirated h sound in ancient Greek. This character is used in polytonic Greek orthography, which employs diacritics to denote pronunciation details lost in modern monotonic Greek. Specifically, when appearing at the beginning of a word, the dasia over the iota signals that the word should be pronounced with a breathy onset, similar to the English h sound, making it distinct from the smooth breathing counterpart. As part of the Unicode standard, this character facilitates accurate representation and digital preservation of classical and scholarly Greek texts.