U+044A "ъ" Cyrillic Small Letter Hard Sign Unicode Character

U+044A "ъ" Cyrillic Small Letter Hard Sign is a letter in the Cyrillic script that originally represented a very short, ultra-short vowel sound known as the "jer" in Old Church Slavonic. In modern Russian, it has no phonetic value of its own but functions as a "hard sign" (твёрдый знак), indicating that the preceding consonant is not palatalized before a following vowel, typically in compound words or prefixes. In Bulgarian, however, it is a full-fledged vowel pronounced as a schwa or mid-central vowel sound /ɤ/. The uppercase counterpart is U+042A and the character is also present in other Cyrillic alphabets such as Rusyn and some East Slavic languages for historical or orthographic purposes, though its use is distinct among them.