Etymology

hard sign

Today it means: The Cyrillic letter Ъ/ъ, which in modern languages serves to denote a hard (non-palatalized) consonant. Full definition →

Russian твёрдый знак
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The story

  1. Russian · calque ofтвёрдый знак
  2. English todayhard sign

Calque of Russian твёрдый знак (tvjórdyj znak).

Etymology from Wiktionary, CC BY-SA 4.0.