"сирть" meaning in Erzya

{
  "forms": [
    {
      "form": "śiŕť",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "myv",
        "2": "noun"
      },
      "expansion": "сирть • (śiŕť)",
      "name": "head"
    }
  ],
  "lang": "Erzya",
  "lang_code": "myv",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Erzya entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "myv",
          "name": "Olive family plants",
          "orig": "myv:Olive family plants",
          "parents": [
            "Lamiales order plants",
            "Plants",
            "Shrubs",
            "Trees",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "ash (ash tree)"
      ],
      "id": "en-сирть-myv-noun-A~EX7c-E",
      "links": [
        [
          "ash",
          "ash"
        ],
        [
          "ash tree",
          "ash tree"
        ]
      ]
    }
  ],
  "word": "сирть"
}

{
  "forms": [
    {
      "form": "śiŕť",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "myv",
        "2": "noun"
      },
      "expansion": "сирть • (śiŕť)",
      "name": "head"
    }
  ],
  "lang": "Erzya",
  "lang_code": "myv",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Erzya entries with incorrect language header",
        "Erzya lemmas",
        "Erzya nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for pronunciation in Erzya entries",
        "myv:Olive family plants"
      ],
      "glosses": [
        "ash (ash tree)"
      ],
      "links": [
        [
          "ash",
          "ash"
        ],
        [
          "ash tree",
          "ash tree"
        ]
      ]
    }
  ],
  "word": "сирть"
}