"четверо-" meaning in Russian

{
  "forms": [
    {
      "form": "četvero-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "prefix"
      },
      "expansion": "четверо- • (četvero-)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "quadri-, tetra- (four)"
      ],
      "id": "en-четверо--ru-prefix-McT661Ct",
      "links": [
        [
          "quadri-",
          "quadri-#English"
        ],
        [
          "tetra-",
          "tetra-#English"
        ]
      ],
      "related": [
        {
          "roman": "čétvero",
          "word": "че́тверо"
        },
        {
          "roman": "četvjórka",
          "word": "четвёрка"
        },
        {
          "roman": "četýre",
          "word": "четы́ре"
        },
        {
          "roman": "čétvertʹ",
          "word": "че́тверть"
        },
        {
          "roman": "četvjórtyj",
          "word": "четвёртый"
        },
        {
          "roman": "četvertnój",
          "word": "четвертно́й"
        },
        {
          "roman": "četvernája",
          "word": "четверна́я"
        },
        {
          "roman": "četvjórtka",
          "word": "четвёртка"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɪtvʲɪrə]"
    }
  ],
  "word": "четверо-"
}

{
  "forms": [
    {
      "form": "četvero-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "prefix"
      },
      "expansion": "четверо- • (četvero-)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "prefix",
  "related": [
    {
      "roman": "čétvero",
      "word": "че́тверо"
    },
    {
      "roman": "četvjórka",
      "word": "четвёрка"
    },
    {
      "roman": "četýre",
      "word": "четы́ре"
    },
    {
      "roman": "čétvertʹ",
      "word": "че́тверть"
    },
    {
      "roman": "četvjórtyj",
      "word": "четвёртый"
    },
    {
      "roman": "četvertnój",
      "word": "четвертно́й"
    },
    {
      "roman": "četvernája",
      "word": "четверна́я"
    },
    {
      "roman": "četvjórtka",
      "word": "четвёртка"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Russian 3-syllable words",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian prefixes",
        "Russian terms with IPA pronunciation"
      ],
      "glosses": [
        "quadri-, tetra- (four)"
      ],
      "links": [
        [
          "quadri-",
          "quadri-#English"
        ],
        [
          "tetra-",
          "tetra-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕɪtvʲɪrə]"
    }
  ],
  "word": "четверо-"
}