"намертво" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "на",
        "3": "мертво́"
      },
      "expansion": "на (na) + мертво́ (mertvó)",
      "name": "af"
    },
    {
      "args": {
        "1": "ru",
        "2": "на",
        "3": "мёртво"
      },
      "expansion": "на (na) + мёртво (mjórtvo)",
      "name": "af"
    }
  ],
  "etymology_text": "From на (na) + мертво́ (mertvó) or from на (na) + мёртво (mjórtvo).",
  "forms": [
    {
      "form": "на́мертво",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "námertvo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "на́мертво"
      },
      "expansion": "на́мертво • (námertvo)",
      "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"
        }
      ],
      "glosses": [
        "tightly, fast, permanently"
      ],
      "id": "en-намертво-ru-adv-fNQli1lO",
      "links": [
        [
          "tightly",
          "tightly"
        ],
        [
          "fast",
          "fast"
        ],
        [
          "permanently",
          "permanently"
        ]
      ],
      "raw_glosses": [
        "(colloquial) tightly, fast, permanently"
      ],
      "related": [
        {
          "roman": "mjórtvyj",
          "word": "мёртвый"
        },
        {
          "roman": "mertvítʹ",
          "tags": [
            "imperfective"
          ],
          "word": "мертви́ть"
        },
        {
          "roman": "mértvennyj",
          "word": "ме́ртвенный"
        },
        {
          "roman": "mertvéc",
          "tags": [
            "masculine"
          ],
          "word": "мертве́ц"
        },
        {
          "roman": "mertvécki",
          "word": "мертве́цки"
        },
        {
          "roman": "mertvéckaja",
          "tags": [
            "feminine"
          ],
          "word": "мертве́цкая"
        },
        {
          "roman": "mertvečína",
          "tags": [
            "feminine"
          ],
          "word": "мертвечи́на"
        }
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnamʲɪrtvə]"
    }
  ],
  "word": "намертво"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "на",
        "3": "мертво́"
      },
      "expansion": "на (na) + мертво́ (mertvó)",
      "name": "af"
    },
    {
      "args": {
        "1": "ru",
        "2": "на",
        "3": "мёртво"
      },
      "expansion": "на (na) + мёртво (mjórtvo)",
      "name": "af"
    }
  ],
  "etymology_text": "From на (na) + мертво́ (mertvó) or from на (na) + мёртво (mjórtvo).",
  "forms": [
    {
      "form": "на́мертво",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "námertvo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "на́мертво"
      },
      "expansion": "на́мертво • (námertvo)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "mjórtvyj",
      "word": "мёртвый"
    },
    {
      "roman": "mertvítʹ",
      "tags": [
        "imperfective"
      ],
      "word": "мертви́ть"
    },
    {
      "roman": "mértvennyj",
      "word": "ме́ртвенный"
    },
    {
      "roman": "mertvéc",
      "tags": [
        "masculine"
      ],
      "word": "мертве́ц"
    },
    {
      "roman": "mertvécki",
      "word": "мертве́цки"
    },
    {
      "roman": "mertvéckaja",
      "tags": [
        "feminine"
      ],
      "word": "мертве́цкая"
    },
    {
      "roman": "mertvečína",
      "tags": [
        "feminine"
      ],
      "word": "мертвечи́на"
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian 3-syllable words",
        "Russian adverbs",
        "Russian colloquialisms",
        "Russian compound terms",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian terms with IPA pronunciation"
      ],
      "glosses": [
        "tightly, fast, permanently"
      ],
      "links": [
        [
          "tightly",
          "tightly"
        ],
        [
          "fast",
          "fast"
        ],
        [
          "permanently",
          "permanently"
        ]
      ],
      "raw_glosses": [
        "(colloquial) tightly, fast, permanently"
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnamʲɪrtvə]"
    }
  ],
  "word": "намертво"
}