"preexistíssemos" meaning in Portugais

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en portugais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Portugais",
      "orig": "portugais",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "se nós preexistíssemos"
    }
  ],
  "lang": "Portugais",
  "lang_code": "pt",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "preexistir"
        }
      ],
      "glosses": [
        "Première personne du pluriel de l’imparfait du subjonctif de preexistir."
      ],
      "id": "fr-preexistíssemos-pt-verb-nAsgK8~r"
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɾɛ.i.ziʃ.tˈi.sɨ.muʃ\\"
    },
    {
      "ipa": "\\pɾe.e.zis.tʃˈi.se.mʊs\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "preexistíssemos"
}

{
  "categories": [
    "Formes de verbes en portugais",
    "portugais"
  ],
  "forms": [
    {
      "form": "se nós preexistíssemos"
    }
  ],
  "lang": "Portugais",
  "lang_code": "pt",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "preexistir"
        }
      ],
      "glosses": [
        "Première personne du pluriel de l’imparfait du subjonctif de preexistir."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pɾɛ.i.ziʃ.tˈi.sɨ.muʃ\\"
    },
    {
      "ipa": "\\pɾe.e.zis.tʃˈi.se.mʊs\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "preexistíssemos"
}