"אין דער אמתן" meaning in Yiddish

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "der"
      },
      "expansion": "German der",
      "name": "cog"
    }
  ],
  "etymology_text": "Seemingly a fossilized dative plural form of the definite article; compare German der.",
  "forms": [
    {
      "form": "in der emesn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "tr": "in der emesn"
      },
      "expansion": "אין דער אמתן • (in der emesn)",
      "name": "yi-adv"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Yiddish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Yiddish terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "in truth"
      ],
      "id": "en-אין_דער_אמתן-yi-adv-CefBvief",
      "links": [
        [
          "in truth",
          "in truth"
        ]
      ],
      "synonyms": [
        {
          "word": "אױפֿן אמת"
        }
      ]
    }
  ],
  "word": "אין דער אמתן"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "de",
        "2": "der"
      },
      "expansion": "German der",
      "name": "cog"
    }
  ],
  "etymology_text": "Seemingly a fossilized dative plural form of the definite article; compare German der.",
  "forms": [
    {
      "form": "in der emesn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "tr": "in der emesn"
      },
      "expansion": "אין דער אמתן • (in der emesn)",
      "name": "yi-adv"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Yiddish adverbs",
        "Yiddish entries with incorrect language header",
        "Yiddish lemmas",
        "Yiddish multiword terms",
        "Yiddish terms with non-redundant manual transliterations"
      ],
      "glosses": [
        "in truth"
      ],
      "links": [
        [
          "in truth",
          "in truth"
        ]
      ],
      "synonyms": [
        {
          "word": "אױפֿן אמת"
        }
      ]
    }
  ],
  "word": "אין דער אמתן"
}