U+1F9D "ᾝ" Greek Capital Letter Eta with Dasia and Oxia and Prosgegrammeni Unicode Character

U+1F9D "ᾝ" Greek Capital Letter Eta with Dasia and Oxia and Prosgegrammeni is a complex polytonic Greek letter used in ancient and liturgical texts, combining the capital letter Eta (Η) with three diacritical marks: the dasia (rough breathing mark, indicating an initial /h/ sound), the oxia (an acute accent marking high pitch), and the prosgegrammeni (a small iota subscript written alongside the capital letter, representing a lost long vowel sound). This character is part of the Greek Extended block in Unicode, designed to accurately represent classical Greek orthography, particularly in manuscripts where such detailed annotations preserved pronunciation and grammatical features. Its usage is mainly scholarly or ecclesiastical, appearing in critical editions of ancient works or in Greek Orthodox liturgical books to maintain the textual tradition of Koine and Homeric Greek.