"subterráneas" meaning in Mirandais

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’adjectifs en mirandais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mirandais",
      "orig": "mirandais",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Mirandais",
  "lang_code": "mwl",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "form_of": [
        {
          "word": "subterráneo"
        }
      ],
      "glosses": [
        "Féminin pluriel de subterráneo."
      ],
      "id": "fr-subterráneas-mwl-adj-zK~9P-IK"
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "subterráneas"
}

{
  "categories": [
    "Formes d’adjectifs en mirandais",
    "mirandais"
  ],
  "lang": "Mirandais",
  "lang_code": "mwl",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "form_of": [
        {
          "word": "subterráneo"
        }
      ],
      "glosses": [
        "Féminin pluriel de subterráneo."
      ]
    }
  ],
  "tags": [
    "feminine",
    "form-of"
  ],
  "word": "subterráneas"
}