"быстрей" meaning in Russe

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’adverbes en russe",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Russe",
      "orig": "russe",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "adv",
  "pos_title": "Forme d’adverbe",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Adjectifs comparatifs en russe",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "rapidement"
        }
      ],
      "glosses": [
        "Comparatif de быстрый. Plus rapidement."
      ],
      "id": "fr-быстрей-ru-adv-OEOAwCo1"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "быстрей"
}

{
  "categories": [
    "Formes d’adverbes en russe",
    "russe"
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "adv",
  "pos_title": "Forme d’adverbe",
  "senses": [
    {
      "categories": [
        "Adjectifs comparatifs en russe"
      ],
      "form_of": [
        {
          "word": "rapidement"
        }
      ],
      "glosses": [
        "Comparatif de быстрый. Plus rapidement."
      ]
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "быстрей"
}