"demi-clé" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Date à préciser) Dérivé de clé, avec le préfixe demi-."
  ],
  "forms": [
    {
      "form": "demi-clés",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "demi-clef"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Nœud le plus simple formé d'une boucle dans laquelle passe le bout du cordage."
      ],
      "id": "fr-demi-clé-fr-noun-yjUcScms"
    }
  ],
  "sounds": [
    {
      "ipa": "\\də.mi.kle\\"
    }
  ],
  "synonyms": [
    {
      "word": "demi-nœud"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "overhand knot"
    }
  ],
  "word": "demi-clé"
}

{
  "categories": [
    "Lemmes en français",
    "Noms communs en français",
    "Traductions en anglais",
    "français"
  ],
  "etymology_texts": [
    "(Date à préciser) Dérivé de clé, avec le préfixe demi-."
  ],
  "forms": [
    {
      "form": "demi-clés",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "demi-clef"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Nœud le plus simple formé d'une boucle dans laquelle passe le bout du cordage."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\də.mi.kle\\"
    }
  ],
  "synonyms": [
    {
      "word": "demi-nœud"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "overhand knot"
    }
  ],
  "word": "demi-clé"
}