"أم أربع وأربعين" meaning in Arabic

{
  "forms": [
    {
      "form": "أُمّ أَرْبَع وَ أَرْبَعِين",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʔumm ʔarbaʕ waʔarbaʕīn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "أُمّ أَرْبَع وَأَرْبَعِين",
        "2": "f"
      },
      "expansion": "أُمّ أَرْبَع وَأَرْبَعِين • (ʔumm ʔarbaʕ waʔarbaʕīn) f",
      "name": "ar-noun"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Arabic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Arabic feminine terms lacking feminine ending",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "ar",
          "name": "Myriapods",
          "orig": "ar:Myriapods",
          "parents": [
            "Arthropods",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "centipede"
      ],
      "id": "en-أم_أربع_وأربعين-ar-noun-YZiPLanh",
      "links": [
        [
          "centipede",
          "centipede"
        ]
      ],
      "synonyms": [
        {
          "roman": "ʔumm ʔarbaʕa waʔarbaʕīn",
          "word": "أُمّ أَرْبَعة وَأَرْبَعِين"
        }
      ]
    }
  ],
  "word": "أم أربع وأربعين"
}

{
  "forms": [
    {
      "form": "أُمّ أَرْبَع وَ أَرْبَعِين",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʔumm ʔarbaʕ waʔarbaʕīn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "أُمّ أَرْبَع وَأَرْبَعِين",
        "2": "f"
      },
      "expansion": "أُمّ أَرْبَع وَأَرْبَعِين • (ʔumm ʔarbaʕ waʔarbaʕīn) f",
      "name": "ar-noun"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Arabic entries with incorrect language header",
        "Arabic feminine nouns",
        "Arabic feminine terms lacking feminine ending",
        "Arabic lemmas",
        "Arabic multiword terms",
        "Arabic nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "ar:Myriapods"
      ],
      "glosses": [
        "centipede"
      ],
      "links": [
        [
          "centipede",
          "centipede"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "ʔumm ʔarbaʕa waʔarbaʕīn",
      "word": "أُمّ أَرْبَعة وَأَرْبَعِين"
    }
  ],
  "word": "أم أربع وأربعين"
}