U+1FB4 "ᾴ" Greek Small Letter Alpha with Oxia and Ypogegrammeni Unicode Character

U+1FB4 "ᾴ" Greek Small Letter Alpha with Oxia and Ypogegrammeni is a precomposed character used in polytonic Greek orthography to represent the vowel alpha with an acute accent (oxia) and a subscript iota (ypogegrammeni), which indicates a long diphthong that historically derived from an alpha followed by an iota. This character is typically employed in ancient or liturgical Greek texts, where it appears in contexts such as the verb "ἵνα ᾴ" (so that he may sing) to mark a specific grammatical mood or case. As part of the Greek Extended block, U+1FB4 serves as a convenience for rendering combined diacritics in a single code point, though it can also be represented as a sequence of the base letter and combining marks. Its usage is rare in modern Greek, which has simplified to monotonic orthography, but it remains essential for accurate typographic representation of classical and ecclesiastical writings.