"for why" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "for why (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": "Non-native speakers' English",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017, Velvel Pasternak, Behind the Music, Stories, Anecdotes, Articles and Reflections, page 62",
          "text": "As she tied the boxes, her curiosity could no longer be contained. \"Mister,\" she said, \"for why do you need such hats?\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "For what reason; why."
      ],
      "id": "en-for_why-en-adv-gtUyw7Cm",
      "links": [
        [
          "non-native speaker",
          "non-native speaker"
        ]
      ],
      "qualifier": "obsolete except non-native speakers' English",
      "raw_glosses": [
        "(obsolete except non-native speakers' English) For what reason; why."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "for why"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "for why (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with obsolete senses",
        "English terms with quotations",
        "English uncomparable adverbs",
        "Non-native speakers' English"
      ],
      "examples": [
        {
          "ref": "2017, Velvel Pasternak, Behind the Music, Stories, Anecdotes, Articles and Reflections, page 62",
          "text": "As she tied the boxes, her curiosity could no longer be contained. \"Mister,\" she said, \"for why do you need such hats?\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "For what reason; why."
      ],
      "links": [
        [
          "non-native speaker",
          "non-native speaker"
        ]
      ],
      "qualifier": "obsolete except non-native speakers' English",
      "raw_glosses": [
        "(obsolete except non-native speakers' English) For what reason; why."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "for why"
}