"без-" meaning in Russian

{
  "derived": [
    {
      "_dis1": "0 0",
      "roman": "bezavtoklavnyj",
      "word": "безавтоклавный"
    },
    {
      "_dis1": "0 0",
      "roman": "bezatomnyj",
      "word": "безатомный"
    },
    {
      "_dis1": "0 0",
      "roman": "bezglasnyj",
      "word": "безгласный"
    },
    {
      "_dis1": "0 0",
      "roman": "bezgolosnyj",
      "word": "безголосный"
    },
    {
      "_dis1": "0 0",
      "roman": "bezlapyj",
      "word": "безлапый"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "sla-pro",
        "3": "*bez-"
      },
      "expansion": "Proto-Slavic *bez-",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Slavic *bez-.",
  "forms": [
    {
      "form": "bez-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "prefix",
        "cat2": "verbal prefixes"
      },
      "expansion": "без- • (bez-)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "prefix",
  "related": [
    {
      "_dis1": "0 0",
      "roman": "bez",
      "word": "без"
    },
    {
      "_dis1": "0 0",
      "roman": "bezo",
      "word": "безо"
    },
    {
      "_dis1": "0 0",
      "roman": "bes-",
      "word": "бес-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "dis-, un-"
      ],
      "id": "en-без--ru-prefix-p7hkfeyA",
      "links": [
        [
          "dis-",
          "dis-"
        ],
        [
          "un-",
          "un-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "38 62",
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "bottom surface",
          "roman": "dno",
          "text": "дно",
          "type": "example"
        },
        {
          "english": "abyss; bottomless pit",
          "roman": "bézdna",
          "text": "бе́здна",
          "type": "example"
        },
        {
          "english": "to rest",
          "roman": "pokóitʹsja",
          "text": "поко́иться",
          "type": "example"
        },
        {
          "english": "to disturb",
          "roman": "bespokóitʹ",
          "text": "беспоко́ить",
          "type": "example"
        }
      ],
      "glosses": [
        "-less"
      ],
      "id": "en-без--ru-prefix-URIvEffD",
      "links": [
        [
          "-less",
          "-less"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bʲɪz]"
    }
  ],
  "word": "без-"
}

{
  "categories": [
    "Pages with 6 entries",
    "Pages with entries",
    "Russian 1-syllable words",
    "Russian entries with incorrect language header",
    "Russian lemmas",
    "Russian prefixes",
    "Russian terms derived from Proto-Slavic",
    "Russian terms with IPA pronunciation",
    "Russian verbal prefixes"
  ],
  "derived": [
    {
      "roman": "bezavtoklavnyj",
      "word": "безавтоклавный"
    },
    {
      "roman": "bezatomnyj",
      "word": "безатомный"
    },
    {
      "roman": "bezglasnyj",
      "word": "безгласный"
    },
    {
      "roman": "bezgolosnyj",
      "word": "безголосный"
    },
    {
      "roman": "bezlapyj",
      "word": "безлапый"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "sla-pro",
        "3": "*bez-"
      },
      "expansion": "Proto-Slavic *bez-",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Slavic *bez-.",
  "forms": [
    {
      "form": "bez-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "prefix",
        "cat2": "verbal prefixes"
      },
      "expansion": "без- • (bez-)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "prefix",
  "related": [
    {
      "roman": "bez",
      "word": "без"
    },
    {
      "roman": "bezo",
      "word": "безо"
    },
    {
      "roman": "bes-",
      "word": "бес-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "dis-, un-"
      ],
      "links": [
        [
          "dis-",
          "dis-"
        ],
        [
          "un-",
          "un-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        "Russian terms with usage examples"
      ],
      "examples": [
        {
          "english": "bottom surface",
          "roman": "dno",
          "text": "дно",
          "type": "example"
        },
        {
          "english": "abyss; bottomless pit",
          "roman": "bézdna",
          "text": "бе́здна",
          "type": "example"
        },
        {
          "english": "to rest",
          "roman": "pokóitʹsja",
          "text": "поко́иться",
          "type": "example"
        },
        {
          "english": "to disturb",
          "roman": "bespokóitʹ",
          "text": "беспоко́ить",
          "type": "example"
        }
      ],
      "glosses": [
        "-less"
      ],
      "links": [
        [
          "-less",
          "-less"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bʲɪz]"
    }
  ],
  "word": "без-"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: бес- (bes-) is used before voiceless consonants",
  "path": [
    "без-"
  ],
  "section": "Russian",
  "subsection": "prefix",
  "title": "без-",
  "trace": ""
}