"therewithin" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "there",
        "3": "within"
      },
      "expansion": "there + within",
      "name": "compound"
    }
  ],
  "etymology_text": "From there + within. More at pronominal adverb.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "therewithin (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Within that."
      ],
      "id": "en-therewithin-en-adv-zYAz7igf",
      "raw_glosses": [
        "(archaic) Within that."
      ],
      "tags": [
        "archaic",
        "not-comparable"
      ]
    }
  ],
  "word": "therewithin"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "there",
        "3": "within"
      },
      "expansion": "there + within",
      "name": "compound"
    }
  ],
  "etymology_text": "From there + within. More at pronominal adverb.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "therewithin (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English compound terms",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English pronominal adverbs",
        "English terms with archaic senses",
        "English uncomparable adverbs",
        "Pages with 1 entry"
      ],
      "glosses": [
        "Within that."
      ],
      "raw_glosses": [
        "(archaic) Within that."
      ],
      "tags": [
        "archaic",
        "not-comparable"
      ]
    }
  ],
  "word": "therewithin"
}