"inestables" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "adjective form",
        "g": "m-p",
        "g2": "f-p"
      },
      "expansion": "inestables m pl or f pl",
      "name": "head"
    }
  ],
  "hyphenation": [
    "i‧nes‧ta‧bles"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "inestable"
        }
      ],
      "glosses": [
        "plural of inestable"
      ],
      "id": "en-inestables-es-adj-cXeuZf8y",
      "links": [
        [
          "inestable",
          "inestable#Spanish"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "masculine",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/inesˈtables/"
    },
    {
      "ipa": "[i.nesˈt̪a.β̞les]"
    },
    {
      "rhymes": "-ables"
    }
  ],
  "word": "inestables"
}

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "adjective form",
        "g": "m-p",
        "g2": "f-p"
      },
      "expansion": "inestables m pl or f pl",
      "name": "head"
    }
  ],
  "hyphenation": [
    "i‧nes‧ta‧bles"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Rhymes:Spanish/ables",
        "Rhymes:Spanish/ables/4 syllables",
        "Spanish 4-syllable words",
        "Spanish adjective forms",
        "Spanish entries with incorrect language header",
        "Spanish non-lemma forms",
        "Spanish terms with IPA pronunciation"
      ],
      "form_of": [
        {
          "word": "inestable"
        }
      ],
      "glosses": [
        "plural of inestable"
      ],
      "links": [
        [
          "inestable",
          "inestable#Spanish"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "masculine",
        "plural"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/inesˈtables/"
    },
    {
      "ipa": "[i.nesˈt̪a.β̞les]"
    },
    {
      "rhymes": "-ables"
    }
  ],
  "word": "inestables"
}