"فاجأنا" meaning in Arabic

{
  "forms": [
    {
      "form": "فَاجَأْنَا",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "fājaʔnā",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "فَاجَأْنَا",
        "2": "III"
      },
      "expansion": "فَاجَأْنَا • (fājaʔnā) (form III)",
      "name": "ar-verb-form"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Arabic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "fājaʔa",
          "word": "فَاجَأَ"
        }
      ],
      "glosses": [
        "first-person plural past active of فَاجَأَ (fājaʔa)"
      ],
      "id": "en-فاجأنا-ar-verb-2uexLXiR",
      "links": [
        [
          "فَاجَأَ",
          "فاجأ#Arabic"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-iii",
        "form-of",
        "past",
        "plural"
      ]
    }
  ],
  "word": "فاجأنا"
}

{
  "forms": [
    {
      "form": "فَاجَأْنَا",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "fājaʔnā",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "فَاجَأْنَا",
        "2": "III"
      },
      "expansion": "فَاجَأْنَا • (fājaʔnā) (form III)",
      "name": "ar-verb-form"
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Arabic entries with incorrect language header",
        "Arabic non-lemma forms",
        "Arabic verb forms"
      ],
      "form_of": [
        {
          "extra": "fājaʔa",
          "word": "فَاجَأَ"
        }
      ],
      "glosses": [
        "first-person plural past active of فَاجَأَ (fājaʔa)"
      ],
      "links": [
        [
          "فَاجَأَ",
          "فاجأ#Arabic"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-iii",
        "form-of",
        "past",
        "plural"
      ]
    }
  ],
  "word": "فاجأنا"
}