U+1E015 "𞀕" Combining Glagolitic Letter Tvrido Unicode Character

U+1E015 "𞀕" Combining Glagolitic Letter Tvrido is a combining diacritical mark used in the Glagolitic script, the oldest known Slavic alphabet, where it represents a modified variant of the letter “tvrido.” This character is encoded in the Combining Glagolitic Letters block (U+1E000–U+1E02F), and it is designed to combine with a base Glagolitic letter to indicate a specific phonetic or orthographic nuance, likely involving the hardening or tensing of the preceding consonant sound. Its use is primarily historical and academic, appearing in digital representations of ancient Slavic manuscripts and in scholarly works on Old Church Slavonic or early Slavic linguistics.