"снага" meaning in Vieux slave

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en vieux slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vieux slave",
      "orig": "vieux slave",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Bulgare",
      "lang_code": "bg",
      "word": "снага"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "снага"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "snaha"
    }
  ],
  "etymology_texts": [
    "Étymologie incertaine, probablement apparenté au lituanien nogetis (« vouloir ») mais un lien avec něha (« bienveillance ») n’est pas à écarter."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "snaga"
  ],
  "senses": [
    {
      "glosses": [
        "Force, effort."
      ],
      "id": "fr-снага-cu-noun-BqYTp24q"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "снага"
}

{
  "categories": [
    "Noms communs en vieux slave",
    "vieux slave"
  ],
  "derived": [
    {
      "lang": "Bulgare",
      "lang_code": "bg",
      "word": "снага"
    },
    {
      "lang": "Serbo-croate",
      "lang_code": "sh",
      "word": "снага"
    },
    {
      "lang": "Tchèque",
      "lang_code": "cs",
      "word": "snaha"
    }
  ],
  "etymology_texts": [
    "Étymologie incertaine, probablement apparenté au lituanien nogetis (« vouloir ») mais un lien avec něha (« bienveillance ») n’est pas à écarter."
  ],
  "lang": "Vieux slave",
  "lang_code": "cu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "snaga"
  ],
  "senses": [
    {
      "glosses": [
        "Force, effort."
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "снага"
}