Hard sign

Ъ ъ
Phonetic usage:	/j/. Bulgarian: /ɤ̞/
The Cyrillic script
Slavic letters
А Б В Г Ґ Д Ђ Ѓ Е Ѐ Ё Є Ж З З́ Ѕ И Ѝ І Ї Й Ј К Л Љ М Н Њ О П Р С С́ Т Ћ Ќ У Ў Ф Х Ц Ч Џ Ш Щ Ъ Ы Ь Э Ю Я
Non-Slavic letters
А́ А̀ Ӑ А̄ А̊ А̃ Ӓ Ӓ̄ В̌ Ә Ә́ Ә̃ Ӛ Ӕ Ғ Г̧ Г̑ Г̄ Г̣ Г̌ Ҕ Ӻ Ғ̌ Ӷ Ԁ Ԃ Ꚃ Ꚁ Ꚉ Д̆ Д̣ Ԫ Ԭ Д̆ Ӗ Е̄ Е̃ Ё̄ Є̈ Ӂ Җ Ꚅ Ӝ Ԅ Ҙ Ӟ З̌ З̱ З̣ Ԑ Ԑ̈ Ӡ Ԇ Ӣ И̃ Ҋ Ӥ И́ Қ Ӄ Ҡ Ҟ Ҝ Ԟ К̣ Ԛ Ӆ Ԯ Ԓ Ԡ Ԉ Ԕ Ӎ Ӊ Ң Ԩ Ӈ Ҥ Ԣ Ԋ О́ О̀ О̆ О̂ О̃ О̄ Ӧ Ӧ̄ Ө Ө̄ Ө́ Ө̆ Ӫ Ҩ Ԥ Ҧ Р̌ Ҏ Ԗ Ҫ С̣ С̱ Ԍ Т̌ Т̣ Ꚑ Ҭ Ꚋ Ꚍ Ԏ У̃ Ӯ Ӱ Ӱ́ Ӳ Ү Ү́ Ұ Х̣ Х̱ Х̮ Х̑ Ҳ Ӽ Ӿ Һ Һ̈ Ԧ Ꚕ Ҵ Ꚏ Ҷ Ӵ Ӌ Ҹ Ꚓ Ꚗ Ꚇ Ҽ Ҿ Ы̆ Ы̄ Ӹ Ҍ Э̆ Э̄ Э̇ Ӭ Ӭ́ Ӭ̄ Ю̆ Ю̈ Ю̈́ Ю̄ Я̆ Я̄ Я̈ Ԙ Ԝ Ӏ
Archaic letters
Ꙁ Ꙃ Ꙅ Ꙇ Ꙉ Ҁ Ѻ Ѹ Ꙋ Ѡ Ѽ Ꙍ Ѿ Ꙏ Ѣ Ꙑ Ꙓ Ꙕ Ꙗ Ѥ Ѧ Ꙙ Ѫ Ꙛ Ѩ Ꙝ Ѭ Ѯ Ѱ Ѳ Ѵ Ѷ Ꙟ Ꙡ Ꙣ Ꙥ Ꙧ Ꙩ Ꙫ Ꙭ ꙮ Ꚙ Ꚛ
List of Cyrillic letters Cyrillic digraphs

The hard sign (Ъ, ъ) is a letter and punctuation mark from the Cyrillic alphabet. It is used in Bulgarian, Russian, Kazakh and Rusyn. It is named "the tvyordyy znak" or simply "tvyordyy" in Russian.

In Ukrainian and Belarusian, it is replaced by the apostrophe (').