"דערצו" meaning in Yiddish

{
  "etymology_templates": [
    {
      "args": {
        "1": "yi",
        "2": "דער",
        "3": "צו"
      },
      "expansion": "דער (der) + צו (tsu)",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "thereto"
      },
      "expansion": "English thereto",
      "name": "cog"
    }
  ],
  "etymology_text": "דער (der) + צו (tsu), comparable to English thereto",
  "forms": [
    {
      "form": "dertsu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "דערצו • (dertsu)",
      "name": "yi-adv"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Yiddish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "in addition"
      ],
      "id": "en-דערצו-yi-adv-nIAn8IfP",
      "links": [
        [
          "in addition",
          "in addition"
        ]
      ]
    },
    {
      "glosses": [
        "to it"
      ],
      "id": "en-דערצו-yi-adv-LyMWHJ0n",
      "links": [
        [
          "to",
          "to"
        ],
        [
          "it",
          "it"
        ]
      ]
    }
  ],
  "word": "דערצו"
}

{
  "categories": [
    "Pages with 1 entry",
    "Yiddish adverbs",
    "Yiddish compound terms",
    "Yiddish entries with incorrect language header",
    "Yiddish lemmas"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "yi",
        "2": "דער",
        "3": "צו"
      },
      "expansion": "דער (der) + צו (tsu)",
      "name": "compound"
    },
    {
      "args": {
        "1": "en",
        "2": "thereto"
      },
      "expansion": "English thereto",
      "name": "cog"
    }
  ],
  "etymology_text": "דער (der) + צו (tsu), comparable to English thereto",
  "forms": [
    {
      "form": "dertsu",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "דערצו • (dertsu)",
      "name": "yi-adv"
    }
  ],
  "lang": "Yiddish",
  "lang_code": "yi",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "in addition"
      ],
      "links": [
        [
          "in addition",
          "in addition"
        ]
      ]
    },
    {
      "glosses": [
        "to it"
      ],
      "links": [
        [
          "to",
          "to"
        ],
        [
          "it",
          "it"
        ]
      ]
    }
  ],
  "word": "דערצו"
}