"brein-krign" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de brein (« pourriture ») et de krign."
  ],
  "forms": [
    {
      "form": "vrein-krign",
      "tags": [
        "mutation-soft"
      ]
    },
    {
      "form": "prein-krign",
      "tags": [
        "mutation-hard"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en breton de la nosologie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Gangrène."
      ],
      "id": "fr-brein-krign-br-noun--B30DyTt",
      "raw_tags": [
        "Nosologie"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\brɛjn.ˈkrĩɲ\\"
    }
  ],
  "synonyms": [
    {
      "word": "breinged"
    },
    {
      "word": "marvenn-gig"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "brein-krign"
}

{
  "categories": [
    "Compositions en breton",
    "Noms communs en breton",
    "breton"
  ],
  "etymology_texts": [
    "Composé de brein (« pourriture ») et de krign."
  ],
  "forms": [
    {
      "form": "vrein-krign",
      "tags": [
        "mutation-soft"
      ]
    },
    {
      "form": "prein-krign",
      "tags": [
        "mutation-hard"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en breton de la nosologie"
      ],
      "glosses": [
        "Gangrène."
      ],
      "raw_tags": [
        "Nosologie"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\brɛjn.ˈkrĩɲ\\"
    }
  ],
  "synonyms": [
    {
      "word": "breinged"
    },
    {
      "word": "marvenn-gig"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "brein-krign"
}