"تستندين" meaning in Arabic

{
  "forms": [
    {
      "form": "تَسْتَنِدِينَ",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "tastanidīna",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "تَسْتَنِدِينَ",
        "2": "VIII"
      },
      "expansion": "تَسْتَنِدِينَ • (tastanidīna) (form VIII)",
      "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": "istanada",
          "word": "اِسْتَنَدَ"
        }
      ],
      "glosses": [
        "second-person feminine singular non-past active indicative of اِسْتَنَدَ (istanada)"
      ],
      "id": "en-تستندين-ar-verb-QcFL6kPS",
      "links": [
        [
          "اِسْتَنَدَ",
          "استند#Arabic"
        ]
      ],
      "tags": [
        "active",
        "feminine",
        "form-of",
        "form-viii",
        "indicative",
        "non-past",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "تستندين"
}

{
  "forms": [
    {
      "form": "تَسْتَنِدِينَ",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "tastanidīna",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "تَسْتَنِدِينَ",
        "2": "VIII"
      },
      "expansion": "تَسْتَنِدِينَ • (tastanidīna) (form VIII)",
      "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": "istanada",
          "word": "اِسْتَنَدَ"
        }
      ],
      "glosses": [
        "second-person feminine singular non-past active indicative of اِسْتَنَدَ (istanada)"
      ],
      "links": [
        [
          "اِسْتَنَدَ",
          "استند#Arabic"
        ]
      ],
      "tags": [
        "active",
        "feminine",
        "form-of",
        "form-viii",
        "indicative",
        "non-past",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "تستندين"
}