"beta" meaning in Basque

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en basque",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Basque",
      "orig": "basque",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "betan"
    },
    {
      "word": "betantsu"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "text": "Ez dut betarik izan, je n'ai pas le temps."
        }
      ],
      "glosses": [
        "Temps libre, loisir."
      ],
      "id": "fr-beta-eu-noun-y8qmGdFO"
    }
  ],
  "word": "beta"
}

{
  "categories": [
    "Noms communs en basque",
    "basque"
  ],
  "derived": [
    {
      "word": "betan"
    },
    {
      "word": "betantsu"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "text": "Ez dut betarik izan, je n'ai pas le temps."
        }
      ],
      "glosses": [
        "Temps libre, loisir."
      ]
    }
  ],
  "word": "beta"
}