"тридцатым" meaning in Russian

{
  "forms": [
    {
      "form": "тридца́тым",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "tridcátym",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "adjective form",
        "head": "тридца́тым"
      },
      "expansion": "тридца́тым • (tridcátym)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "_dis": "60 40",
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "inflection of тридца́тый (tridcátyj):",
        "instrumental singular masculine/neuter"
      ],
      "id": "en-тридцатым-ru-adj-tUYEa~OV",
      "links": [
        [
          "тридца́тый",
          "тридцатый#Russian"
        ]
      ],
      "tags": [
        "form-of",
        "instrumental",
        "masculine",
        "neuter",
        "singular"
      ]
    },
    {
      "glosses": [
        "inflection of тридца́тый (tridcátyj):",
        "dative plural"
      ],
      "id": "en-тридцатым-ru-adj-zD3tTm5S",
      "links": [
        [
          "тридца́тый",
          "тридцатый#Russian"
        ]
      ],
      "tags": [
        "dative",
        "form-of",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[trʲɪˈt͡s(ː)atɨm]"
    }
  ],
  "word": "тридцатым"
}

{
  "categories": [
    "Russian 3-syllable words",
    "Russian adjective forms",
    "Russian entries with incorrect language header",
    "Russian non-lemma forms",
    "Russian terms with IPA pronunciation"
  ],
  "forms": [
    {
      "form": "тридца́тым",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "tridcátym",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "adjective form",
        "head": "тридца́тым"
      },
      "expansion": "тридца́тым • (tridcátym)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adj",
  "senses": [
    {
      "glosses": [
        "inflection of тридца́тый (tridcátyj):",
        "instrumental singular masculine/neuter"
      ],
      "links": [
        [
          "тридца́тый",
          "тридцатый#Russian"
        ]
      ],
      "tags": [
        "form-of",
        "instrumental",
        "masculine",
        "neuter",
        "singular"
      ]
    },
    {
      "glosses": [
        "inflection of тридца́тый (tridcátyj):",
        "dative plural"
      ],
      "links": [
        [
          "тридца́тый",
          "тридцатый#Russian"
        ]
      ],
      "tags": [
        "dative",
        "form-of",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[trʲɪˈt͡s(ː)atɨm]"
    }
  ],
  "word": "тридцатым"
}