"отчего" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru"
      },
      "expansion": "Univerbation",
      "name": "univerbation"
    },
    {
      "args": {
        "1": "ru",
        "2": "от",
        "3": "",
        "4": "from, out of"
      },
      "expansion": "от (ot, “from, out of”)",
      "name": "m"
    },
    {
      "args": {
        "1": "ru",
        "2": "чего́"
      },
      "expansion": "чего́ (čevó)",
      "name": "m"
    },
    {
      "args": {
        "1": "ru",
        "2": "что"
      },
      "expansion": "что (što)",
      "name": "m"
    }
  ],
  "etymology_text": "Univerbation of the preposition от (ot, “from, out of”) + чего́ (čevó), genitive singular of что (što).",
  "forms": [
    {
      "form": "отчего́",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "otčevó",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "отчего́"
      },
      "expansion": "отчего́ • (otčevó)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian univerbations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "why? (from what cause)"
      ],
      "id": "en-отчего-ru-adv-GpoaJp1I",
      "links": [
        [
          "why",
          "why"
        ]
      ],
      "raw_glosses": [
        "(interrogative adverb) why? (from what cause)"
      ],
      "related": [
        {
          "roman": "otčevó-to",
          "word": "отчего́-то"
        },
        {
          "roman": "začém",
          "word": "заче́м"
        },
        {
          "roman": "počemú",
          "word": "почему́"
        }
      ],
      "tags": [
        "adverb",
        "interrogative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ɐt͡ɕːɪˈvo]"
    },
    {
      "audio": "Ru-отчего.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/b/bd/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/b/bd/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg",
      "text": "Audio"
    }
  ],
  "word": "отчего"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru"
      },
      "expansion": "Univerbation",
      "name": "univerbation"
    },
    {
      "args": {
        "1": "ru",
        "2": "от",
        "3": "",
        "4": "from, out of"
      },
      "expansion": "от (ot, “from, out of”)",
      "name": "m"
    },
    {
      "args": {
        "1": "ru",
        "2": "чего́"
      },
      "expansion": "чего́ (čevó)",
      "name": "m"
    },
    {
      "args": {
        "1": "ru",
        "2": "что"
      },
      "expansion": "что (što)",
      "name": "m"
    }
  ],
  "etymology_text": "Univerbation of the preposition от (ot, “from, out of”) + чего́ (čevó), genitive singular of что (što).",
  "forms": [
    {
      "form": "отчего́",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "otčevó",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "отчего́"
      },
      "expansion": "отчего́ • (otčevó)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "otčevó-to",
      "word": "отчего́-то"
    },
    {
      "roman": "začém",
      "word": "заче́м"
    },
    {
      "roman": "počemú",
      "word": "почему́"
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian 3-syllable words",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian interrogative adverbs",
        "Russian lemmas",
        "Russian terms with IPA pronunciation",
        "Russian terms with audio links",
        "Russian univerbations"
      ],
      "glosses": [
        "why? (from what cause)"
      ],
      "links": [
        [
          "why",
          "why"
        ]
      ],
      "raw_glosses": [
        "(interrogative adverb) why? (from what cause)"
      ],
      "tags": [
        "adverb",
        "interrogative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ɐt͡ɕːɪˈvo]"
    },
    {
      "audio": "Ru-отчего.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/b/bd/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/b/bd/Ru-%D0%BE%D1%82%D1%87%D0%B5%D0%B3%D0%BE.ogg",
      "text": "Audio"
    }
  ],
  "word": "отчего"
}