"אונטערגאַנגען" meaning in Yiddish

{
  "forms": [
    {
      "form": "untergangen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "yi",
        "2": "noun plural form"
      },
      "expansion": "אונטערגאַנגען • (untergangen)",
      "name": "head"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Yiddish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "untergang",
          "word": "אונטערגאַנג"
        }
      ],
      "glosses": [
        "plural of אונטערגאַנג (untergang)"
      ],
      "id": "en-אונטערגאַנגען-yi-noun-5WZ0IEe1",
      "links": [
        [
          "אונטערגאַנג",
          "אונטערגאַנג#Yiddish"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "word": "אונטערגאַנגען"
}

{
  "forms": [
    {
      "form": "untergangen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "yi",
        "2": "noun plural form"
      },
      "expansion": "אונטערגאַנגען • (untergangen)",
      "name": "head"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Yiddish entries with incorrect language header",
        "Yiddish non-lemma forms",
        "Yiddish noun plural forms"
      ],
      "form_of": [
        {
          "extra": "untergang",
          "word": "אונטערגאַנג"
        }
      ],
      "glosses": [
        "plural of אונטערגאַנג (untergang)"
      ],
      "links": [
        [
          "אונטערגאַנג",
          "אונטערגאַנג#Yiddish"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "word": "אונטערגאַנגען"
}