Soft sign

The soft sign (Ь, ь, italics Ь, ь; Russian: мягкий знак ) also known as the front yer or front er, is a letter of the Cyrillic script. In Old Church Slavonic, it represented a short (or "reduced") front vowel. As with its companion, the back yer ‹ъ›, the vowel phoneme that it designated was later partly dropped and partly merged with other vowels.