"nant" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "ant"
    },
    {
      "word": "Devnent"
    },
    {
      "word": "kornandon"
    },
    {
      "word": "andon"
    }
  ],
  "etymology_texts": [
    "Du vieux breton nant.",
    "À comparer avec les mots nant en gallois, nans en cornique, nanto- en gaulois.",
    "Souvent écrit ant."
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Termes archaïques en breton",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Vallée avec cours d’eau (présent dans les noms de lieux)."
      ],
      "id": "fr-nant-br-noun-LNGp6r5T",
      "tags": [
        "archaic"
      ]
    },
    {
      "glosses": [
        "Talweg."
      ],
      "id": "fr-nant-br-noun-rc6VNI~G"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈnãnt\\"
    }
  ],
  "tags": [
    "masculine",
    "plural"
  ],
  "word": "nant"
}

{
  "categories": [
    "Noms communs en breton",
    "breton"
  ],
  "derived": [
    {
      "word": "ant"
    },
    {
      "word": "Devnent"
    },
    {
      "word": "kornandon"
    },
    {
      "word": "andon"
    }
  ],
  "etymology_texts": [
    "Du vieux breton nant.",
    "À comparer avec les mots nant en gallois, nans en cornique, nanto- en gaulois.",
    "Souvent écrit ant."
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Termes archaïques en breton"
      ],
      "glosses": [
        "Vallée avec cours d’eau (présent dans les noms de lieux)."
      ],
      "tags": [
        "archaic"
      ]
    },
    {
      "glosses": [
        "Talweg."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈnãnt\\"
    }
  ],
  "tags": [
    "masculine",
    "plural"
  ],
  "word": "nant"
}