"Lethe" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en latin issus d’un mot en grec ancien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms propres en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "Lethaea"
    },
    {
      "word": "Lethaeus"
    }
  ],
  "etymology_texts": [
    "Du grec ancien Λήθη, Lếthê (« Oubli »)."
  ],
  "forms": [
    {
      "form": "Lethen",
      "tags": [
        "singular",
        "accusative"
      ]
    },
    {
      "form": "Lethes",
      "tags": [
        "singular",
        "genitive"
      ]
    },
    {
      "form": "Lethae",
      "tags": [
        "singular",
        "dative"
      ]
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en latin",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Léthé."
      ],
      "id": "fr-Lethe-la-name-dtW3zt0Z"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "Lethe"
}

{
  "categories": [
    "Mots en latin issus d’un mot en grec ancien",
    "Noms propres en latin",
    "latin"
  ],
  "derived": [
    {
      "word": "Lethaea"
    },
    {
      "word": "Lethaeus"
    }
  ],
  "etymology_texts": [
    "Du grec ancien Λήθη, Lếthê (« Oubli »)."
  ],
  "forms": [
    {
      "form": "Lethen",
      "tags": [
        "singular",
        "accusative"
      ]
    },
    {
      "form": "Lethes",
      "tags": [
        "singular",
        "genitive"
      ]
    },
    {
      "form": "Lethae",
      "tags": [
        "singular",
        "dative"
      ]
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en latin"
      ],
      "glosses": [
        "Léthé."
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "Lethe"
}