"أركن" meaning in Arabic

{
  "forms": [
    {
      "form": "أَرْكُن",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʔarkun",
      "tags": [
        "romanization"
      ]
    }
  ],
  "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"
        }
      ],
      "form_of": [
        {
          "extra": "rukn",
          "word": "رُكْن"
        }
      ],
      "glosses": [
        "plural of رُكْن (rukn)"
      ],
      "id": "en-أركن-ar-noun-tVw3OSZM",
      "links": [
        [
          "رُكْن",
          "ركن#Arabic"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʔar.kun/"
    }
  ],
  "word": "أركن"
}

{
  "forms": [
    {
      "form": "أَرْكُن",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ʔarkun",
      "tags": [
        "romanization"
      ]
    }
  ],
  "lang": "Arabic",
  "lang_code": "ar",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Arabic 2-syllable words",
        "Arabic entries with incorrect language header",
        "Arabic non-lemma forms",
        "Arabic noun forms",
        "Arabic terms with IPA pronunciation"
      ],
      "form_of": [
        {
          "extra": "rukn",
          "word": "رُكْن"
        }
      ],
      "glosses": [
        "plural of رُكْن (rukn)"
      ],
      "links": [
        [
          "رُكْن",
          "ركن#Arabic"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʔar.kun/"
    }
  ],
  "word": "أركن"
}