"гроза" meaning in Vieux slave

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en vieux slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux slave",
      "orig": "vieux slave",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "translation": "menacer",
      "word": "грозити"
    },
    {
      "translation": "effrayant",
      "word": "грозьнъ"
    },
    {
      "lang": "Polonais",
      "lang_code": "pl",
      "word": "groza"
    },
    {
      "lang": "Russe",
      "lang_code": "ru",
      "word": "гроза"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "hrůza"
    },
    {
      "lang": "Ukrainien",
      "lang_code": "uk",
      "word": "гроза"
    }
  ],
  "etymology_texts": [
    "Avec aussi le sens de « horreur, chose horrible », il est apparenté au grec ancien γοργός, gorgós (« terrible »)."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "groza"
  ],
  "senses": [
    {
      "glosses": [
        "Effroi."
      ],
      "id": "fr-гроза-cu-noun-o0WkvAqd"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "гроза"
}

{
  "categories": [
    "Noms communs en vieux slave",
    "vieux slave"
  ],
  "derived": [
    {
      "translation": "menacer",
      "word": "грозити"
    },
    {
      "translation": "effrayant",
      "word": "грозьнъ"
    },
    {
      "lang": "Polonais",
      "lang_code": "pl",
      "word": "groza"
    },
    {
      "lang": "Russe",
      "lang_code": "ru",
      "word": "гроза"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "hrůza"
    },
    {
      "lang": "Ukrainien",
      "lang_code": "uk",
      "word": "гроза"
    }
  ],
  "etymology_texts": [
    "Avec aussi le sens de « horreur, chose horrible », il est apparenté au grec ancien γοργός, gorgós (« terrible »)."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "groza"
  ],
  "senses": [
    {
      "glosses": [
        "Effroi."
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "гроза"
}