"a buen seguro" meaning in Spanish

{
  "head_templates": [
    {
      "args": {},
      "expansion": "a buen seguro",
      "name": "es-adv"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "The LPH promulgated on July 21, 1960, in the midst of a dictatorship and an emerging developmentalism was, for sure, the first legal instrument that contained the democratic principle of voting, […]",
          "ref": "2015 July 21, “La Ley de Propiedad Horizontal, ¿una norma doméstica?”, in El País",
          "text": "La LPH promulgada el 21 de julio de 1960, en plena dictadura y emergiendo un desarrollismo fue, a buen seguro, el primer instrumento legal que contenía el principio democrático del voto, […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "surely, for sure, no doubt"
      ],
      "id": "en-a_buen_seguro-es-adv-KBfvzKvN",
      "links": [
        [
          "surely",
          "surely"
        ],
        [
          "for sure",
          "for sure"
        ],
        [
          "no doubt",
          "no doubt"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) surely, for sure, no doubt"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "a buen seguro"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "a buen seguro",
      "name": "es-adv"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Spanish adverbs",
        "Spanish entries with incorrect language header",
        "Spanish idioms",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish terms with quotations"
      ],
      "examples": [
        {
          "english": "The LPH promulgated on July 21, 1960, in the midst of a dictatorship and an emerging developmentalism was, for sure, the first legal instrument that contained the democratic principle of voting, […]",
          "ref": "2015 July 21, “La Ley de Propiedad Horizontal, ¿una norma doméstica?”, in El País",
          "text": "La LPH promulgada el 21 de julio de 1960, en plena dictadura y emergiendo un desarrollismo fue, a buen seguro, el primer instrumento legal que contenía el principio democrático del voto, […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "surely, for sure, no doubt"
      ],
      "links": [
        [
          "surely",
          "surely"
        ],
        [
          "for sure",
          "for sure"
        ],
        [
          "no doubt",
          "no doubt"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) surely, for sure, no doubt"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "a buen seguro"
}